diff --git a/crates/lingua/src/processing/transform.rs b/crates/lingua/src/processing/transform.rs
index 3ce3cb4d..7d09912e 100644
--- a/crates/lingua/src/processing/transform.rs
+++ b/crates/lingua/src/processing/transform.rs
@@ -22,9 +22,10 @@ use crate::providers::openai::model_needs_transforms;
 use crate::serde_json;
 use crate::serde_json::Value;
 use crate::universal::{
-    AssistantContent, AssistantContentPart, Message, UniversalReasoningDelta, UniversalRequest,
-    UniversalResponse, UniversalStreamChoice, UniversalStreamChunk, UniversalStreamDelta,
-    UniversalToolCallDelta, UniversalToolFunctionDelta, UserContent, UserContentPart,
+    AssistantContent, AssistantContentPart, Message, TextContentPart, UniversalReasoningDelta,
+    UniversalRequest, UniversalResponse, UniversalStreamChoice, UniversalStreamChunk,
+    UniversalStreamDelta, UniversalToolCallDelta, UniversalToolFunctionDelta, UserContent,
+    UserContentPart,
 };
 use serde::de::DeserializeOwned;
 use thiserror::Error;
@@ -465,6 +466,83 @@ pub fn request_to_universal(input: Bytes) -> Result<UniversalRequest, TransformE
 // Response transformation
 // ============================================================================
 
+fn is_reasoning_only_response_message(msg: &Message) -> bool {
+    match msg {
+        Message::Assistant {
+            content: AssistantContent::Array(parts),
+            ..
+        } => {
+            !parts.is_empty()
+                && parts
+                    .iter()
+                    .all(|part| matches!(part, AssistantContentPart::Reasoning { .. }))
+        }
+        _ => false,
+    }
+}
+
+fn merge_responses_output_parts_for_chat_completions(messages: Vec<Message>) -> Vec<Message> {
+    let mut merged = Vec::with_capacity(messages.len());
+
+    for message in messages {
+        let should_merge = matches!(merged.last(), Some(prev) if is_reasoning_only_response_message(prev))
+            && matches!(message, Message::Assistant { .. });
+
+        if !should_merge {
+            merged.push(message);
+            continue;
+        }
+
+        let Some(previous) = merged.pop() else {
+            merged.push(message);
+            continue;
+        };
+
+        let Message::Assistant {
+            content: AssistantContent::Array(reasoning_parts),
+            id: reasoning_id,
+        } = previous
+        else {
+            merged.push(previous);
+            merged.push(message);
+            continue;
+        };
+
+        let Message::Assistant {
+            content: next_content,
+            id: next_id,
+        } = message
+        else {
+            merged.push(Message::Assistant {
+                content: AssistantContent::Array(reasoning_parts),
+                id: reasoning_id,
+            });
+            merged.push(message);
+            continue;
+        };
+
+        let mut combined_parts = reasoning_parts;
+        match next_content {
+            AssistantContent::Array(parts) => combined_parts.extend(parts),
+            AssistantContent::String(text) => {
+                combined_parts.push(AssistantContentPart::Text(TextContentPart {
+                    text,
+                    encrypted_content: None,
+                    cache_control: None,
+                    provider_options: None,
+                }));
+            }
+        }
+
+        merged.push(Message::Assistant {
+            content: AssistantContent::Array(combined_parts),
+            id: next_id.or(reasoning_id),
+        });
+    }
+
+    merged
+}
+
 /// Transform a response payload from one format to another.
 ///
 /// # Arguments
@@ -495,7 +573,16 @@ pub fn transform_response(
     let target_adapter = adapter_for_format(target_format)
         .ok_or(TransformError::UnsupportedTargetFormat(target_format))?;
 
-    let universal_resp = source_adapter.response_to_universal(response)?;
+    let mut universal_resp = source_adapter.response_to_universal(response)?;
+    if source_format == ProviderFormat::Responses
+        && matches!(
+            target_format,
+            ProviderFormat::ChatCompletions | ProviderFormat::Google
+        )
+    {
+        universal_resp.messages =
+            merge_responses_output_parts_for_chat_completions(universal_resp.messages);
+    }
     let transformed = target_adapter.response_from_universal(&universal_resp)?;
 
     let bytes = crate::serde_json::to_vec(&transformed)
diff --git a/crates/lingua/src/providers/openai/responses_adapter.rs b/crates/lingua/src/providers/openai/responses_adapter.rs
index ec1e5564..7792ed8a 100644
--- a/crates/lingua/src/providers/openai/responses_adapter.rs
+++ b/crates/lingua/src/providers/openai/responses_adapter.rs
@@ -1558,6 +1558,154 @@ mod tests {
         );
     }
 
+    #[test]
+    fn responses_reasoning_then_message_transforms_to_chat_content() {
+        let payload = json!({
+            "id": "resp_123",
+            "object": "response",
+            "model": "gpt-5.5",
+            "status": "completed",
+            "output": [
+                {
+                    "type": "reasoning",
+                    "id": "rs_123",
+                    "summary": [],
+                    "encrypted_content": "encrypted-reasoning"
+                },
+                {
+                    "type": "message",
+                    "id": "msg_123",
+                    "status": "completed",
+                    "role": "assistant",
+                    "content": [{
+                        "type": "output_text",
+                        "text": "visible answer",
+                        "annotations": []
+                    }]
+                }
+            ],
+            "usage": {
+                "input_tokens": 10,
+                "output_tokens": 12,
+                "output_tokens_details": {
+                    "reasoning_tokens": 4
+                },
+                "total_tokens": 22
+            }
+        });
+
+        let transformed = transform_response(
+            Bytes::from(payload.to_string()),
+            ProviderFormat::ChatCompletions,
+        )
+        .expect("Responses response should transform to Chat Completions")
+        .into_bytes();
+
+        #[derive(serde::Deserialize)]
+        struct ChatResponse {
+            choices: Vec<ChatChoice>,
+        }
+
+        #[derive(serde::Deserialize)]
+        struct ChatChoice {
+            message: ChatMessage,
+        }
+
+        #[derive(serde::Deserialize)]
+        struct ChatMessage {
+            content: Option<String>,
+            reasoning: Option<String>,
+            reasoning_signature: Option<String>,
+        }
+
+        let chat: ChatResponse = serde_json::from_slice(&transformed).unwrap();
+
+        assert_eq!(chat.choices.len(), 1);
+        assert_eq!(
+            chat.choices[0].message.content.as_deref(),
+            Some("visible answer")
+        );
+        assert_eq!(chat.choices[0].message.reasoning.as_deref(), Some(""));
+        assert_eq!(
+            chat.choices[0].message.reasoning_signature.as_deref(),
+            Some("encrypted-reasoning")
+        );
+    }
+
+    #[test]
+    fn responses_reasoning_then_message_preserves_output_item_ids_in_universal() {
+        let adapter = ResponsesAdapter;
+        let payload = json!({
+            "id": "resp_123",
+            "object": "response",
+            "model": "gpt-5.5",
+            "status": "completed",
+            "output": [
+                {
+                    "type": "reasoning",
+                    "id": "rs_123",
+                    "summary": [],
+                    "encrypted_content": "encrypted-reasoning"
+                },
+                {
+                    "type": "message",
+                    "id": "msg_123",
+                    "status": "completed",
+                    "role": "assistant",
+                    "content": [{
+                        "type": "output_text",
+                        "text": "visible answer",
+                        "annotations": []
+                    }]
+                }
+            ]
+        });
+
+        let universal = adapter
+            .response_to_universal(payload)
+            .expect("Responses output should convert to universal");
+
+        assert_eq!(universal.messages.len(), 2);
+        assert!(matches!(
+            &universal.messages[0],
+            Message::Assistant {
+                id: Some(id),
+                content: AssistantContent::Array(parts),
+            } if id == "rs_123" && matches!(parts.as_slice(), [AssistantContentPart::Reasoning { .. }])
+        ));
+        assert!(matches!(
+            &universal.messages[1],
+            Message::Assistant {
+                id: Some(id),
+                content: AssistantContent::Array(parts),
+            } if id == "msg_123" && matches!(parts.as_slice(), [AssistantContentPart::Text(_)])
+        ));
+
+        #[derive(serde::Deserialize)]
+        struct ResponsesOutput {
+            output: Vec<ResponsesOutputItem>,
+        }
+
+        #[derive(serde::Deserialize)]
+        struct ResponsesOutputItem {
+            id: String,
+        }
+
+        let serialized = adapter
+            .response_from_universal(&universal)
+            .expect("Universal response should convert back to Responses");
+        let responses: ResponsesOutput = serde_json::from_value(serialized).unwrap();
+
+        assert_eq!(
+            responses
+                .output
+                .iter()
+                .map(|item| item.id.clone())
+                .collect::<Vec<_>>(),
+            vec!["rs_123".to_string(), "msg_123".to_string()]
+        );
+    }
+
     #[test]
     fn test_responses_preserves_deferred_namespace_tool_search_tools() {
         let adapter = ResponsesAdapter;
diff --git a/payloads/scripts/transforms/__snapshots__/transforms.test.ts.snap b/payloads/scripts/transforms/__snapshots__/transforms.test.ts.snap
index 280d141f..99587962 100644
--- a/payloads/scripts/transforms/__snapshots__/transforms.test.ts.snap
+++ b/payloads/scripts/transforms/__snapshots__/transforms.test.ts.snap
@@ -17581,15 +17581,6 @@ exports[`chat-completions → responses > chatCompletionsAnthropicCacheControlPa
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "I don’t see the reference text yet. Please paste the stable reference text you want summarized. If it’s long, feel free to send it in chunks.
@@ -17618,6 +17609,7 @@ Cacheable context card template (you can copy this to store and reuse):
 - Keywords:
 
 Once you provide the text, I’ll generate the summary in your chosen format and treat it as the cacheable context for this session.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -17672,15 +17664,6 @@ exports[`chat-completions → responses > chatCompletionsAssistantCacheControlPa
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "I can’t directly pull a cached prefill from elsewhere in this chat. If you want me to use a prefill, paste its content here or tell me the style you want, and I’ll apply it to my responses. I can also provide you with a reusable prefill you can store and reuse.
@@ -17698,6 +17681,7 @@ Prefill (system-like):
 How to use:
 - Use this as the initial context before your prompt (e.g., as a system message in an API or as a header in your workflow), then ask your question.
 - If you want a domain-specific prefill (coding, legal, medical, etc.), tell me and I’ll tailor it.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -17740,15 +17724,6 @@ exports[`chat-completions → responses > complexReasoningRequest > response 1`]
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Answer (no colon counted, only digits in HHMM):
@@ -17772,6 +17747,7 @@ Most common digits: 0 and 1 (tie), each appearing 1164 times ≈ 20.21% of all d
 Rarest digits: 6, 7, 8, and 9 (tie), each appearing 264 times ≈ 4.58% of all digits.
 
 Brief note on method: counted digit occurrences separately for hour tens (H1), hour units (H2), minute tens (M1), and minute units (M2), then summed.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -17834,15 +17810,6 @@ exports[`chat-completions → responses > exclusiveMinimumToolParam > response 1
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Sure. I can configure the LLM, but I need a max_tokens value to apply.
@@ -17854,6 +17821,7 @@ Options (balanced defaults):
 - 4096 – longer responses
 
 If you’d like, I can apply 2048 tokens right now as a balanced default. Would you like me to set max_tokens to 2048 (or choose another value)? Also, note that this configuration step only covers max_tokens; tell me if you want me to note any other preferences, and I can track them for you.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -17895,18 +17863,10 @@ exports[`chat-completions → responses > fableTemperatureParam > response 1`] =
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Hi there! How can I help you today?",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -17948,18 +17908,10 @@ exports[`chat-completions → responses > frequencyPenaltyParam > response 1`] =
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Ok.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -18028,14 +17980,6 @@ exports[`chat-completions → responses > functionToolsWithReasoningEffortParam
         "annotations": [],
         "reasoning": "",
         "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "tool_calls",
-      "index": 1,
-      "message": {
-        "annotations": [],
-        "role": "assistant",
         "tool_calls": [
           {
             "function": {
@@ -18117,15 +18061,6 @@ exports[`chat-completions → responses > googleToolCallThoughtSignatureReplayPa
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "The collections in the mydb database are:
@@ -18133,6 +18068,7 @@ exports[`chat-completions → responses > googleToolCallThoughtSignatureReplayPa
 - users
 
 Would you like to see document counts or sample documents from any of these?",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -18183,18 +18119,10 @@ exports[`chat-completions → responses > imageUrlMimeTypeFallbackParam > respon
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "A cute tabby cat with striped fur is lying on a warm wooden surface, front paws crossed and head tilted, looking directly at the camera with big amber eyes. Its ears are perked and whiskers are prominent, giving a curious, relaxed expression. The background is softly blurred, suggesting an indoor setting with furniture.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -18241,18 +18169,10 @@ exports[`chat-completions → responses > instructionsParam > response 1`] = `
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "ok",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -18314,18 +18234,10 @@ exports[`chat-completions → responses > jsonSchemaFormatParam > response 1`] =
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "{"created_at":"2026-04-14T00:00:00Z"}",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -18391,18 +18303,10 @@ exports[`chat-completions → responses > jsonSchemaMinMaxItemsParam > response
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "{"tags":["json","api","tags"]}",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -18465,18 +18369,10 @@ exports[`chat-completions → responses > jsonSchemaMinimumMaximumParam > respon
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "{"score":0}",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -18557,18 +18453,10 @@ exports[`chat-completions → responses > jsonSchemaPrefixItemsParam > response
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "{"tuple": ["gateway", 7]}",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -18610,18 +18498,10 @@ exports[`chat-completions → responses > logitBiasParam > response 1`] = `
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Hello! How can I help you today?",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -18678,18 +18558,10 @@ exports[`chat-completions → responses > maxCompletionTokensParam > response 1`
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "ok",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -18737,18 +18609,10 @@ exports[`chat-completions → responses > metadataParam > response 1`] = `
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "ok.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -18844,18 +18708,10 @@ exports[`chat-completions → responses > nMultipleCompletionsParam > response 1
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Hello.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -18898,15 +18754,6 @@ exports[`chat-completions → responses > openaiPromptCacheKeyParam > response 1
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "I don’t have access to a specific “cached policy” in this chat. If you share the policy text (or a link/document), I’ll summarize it right away.
@@ -18926,6 +18773,7 @@ If you paste the policy text, I can provide:
 - A brief section-by-section summary (if the document is long). 
 
 Would you like to share the policy now, or tell me your preferred length and audience for the summary?",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -18971,18 +18819,10 @@ exports[`chat-completions → responses > opus47AdaptiveThinkingReasoningEffortP
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "4",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -19049,14 +18889,6 @@ exports[`chat-completions → responses > parallelToolCallsDisabledParam > respo
         "annotations": [],
         "reasoning": "",
         "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "tool_calls",
-      "index": 1,
-      "message": {
-        "annotations": [],
-        "role": "assistant",
         "tool_calls": [
           {
             "function": {
@@ -19150,15 +18982,6 @@ exports[`chat-completions → responses > parallelToolCallsRequest > response 1`
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Here’s the current weather:
@@ -19167,6 +18990,7 @@ exports[`chat-completions → responses > parallelToolCallsRequest > response 1`
 - New York, NY: 45°F and cloudy
 
 Want an hourly forecast or precipitation chance for either city?",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -19212,15 +19036,6 @@ exports[`chat-completions → responses > predictionParam > response 1`] = `
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Here’s an updated version that adds basic error handling by validating inputs and guarding against division by zero. It throws descriptive errors so callers can handle them with try/catch.
@@ -19256,6 +19071,7 @@ try {
 }
 
 If you prefer a non-throwing variant that returns an error object instead of throwing, tell me and I’ll adapt it.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -19297,18 +19113,10 @@ exports[`chat-completions → responses > presencePenaltyParam > response 1`] =
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Ok.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -19351,18 +19159,10 @@ exports[`chat-completions → responses > promptCacheKeyParam > response 1`] = `
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "ok.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -19407,18 +19207,10 @@ exports[`chat-completions → responses > reasoningEffortLowParam > response 1`]
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "4",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -19460,18 +19252,10 @@ exports[`chat-completions → responses > reasoningEffortMinimalParam > response
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "2 + 2 = 4",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -19554,15 +19338,6 @@ exports[`chat-completions → responses > reasoningRequest > response 1`] = `
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Step 1: Distance of each part
@@ -19577,6 +19352,7 @@ Step 3: Average speed
 - Average speed = total distance / total time = 200 miles / 3 hours = 66 2/3 mph ≈ 66.67 mph
 
 Answer: 66 2/3 mph.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -19666,18 +19442,10 @@ exports[`chat-completions → responses > reasoningSummaryParam > response 1`] =
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "4",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -19719,18 +19487,10 @@ exports[`chat-completions → responses > reasoningWithOutput > response 1`] = `
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Typically blue during a clear day. It can be red/orange/pink at sunrise or sunset, gray when it’s cloudy, and black at night. The blue color comes from the way sunlight scatters in the Earth's atmosphere. Want to know the current sky color for your location and time?",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -19775,18 +19535,10 @@ exports[`chat-completions → responses > safetyIdentifierParam > response 1`] =
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Ok.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -19828,20 +19580,12 @@ exports[`chat-completions → responses > seedParam > response 1`] = `
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "7
 
 Want a different range or another number?",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -19884,18 +19628,10 @@ exports[`chat-completions → responses > serviceTierParam > response 1`] = `
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "ok.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -19940,18 +19676,10 @@ exports[`chat-completions → responses > simpleRequest > response 1`] = `
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Paris",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -20032,18 +19760,10 @@ exports[`chat-completions → responses > stopSequencesParam > response 1`] = `
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -20086,18 +19806,10 @@ exports[`chat-completions → responses > storeDisabledParam > response 1`] = `
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Okay.",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -20212,18 +19924,10 @@ exports[`chat-completions → responses > textFormatJsonObjectParam > response 1
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "{"status": "ok"}",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -20359,18 +20063,10 @@ exports[`chat-completions → responses > textFormatJsonSchemaNullableUnionTypeG
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "{"explanation":"This is a meta-request: the user asks the assistant to classify the current query and respond with JSON. It falls under meta/annotation and instruction-type content.","filter":null,"match":true}",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -20435,18 +20131,10 @@ exports[`chat-completions → responses > textFormatJsonSchemaParam > response 1
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "{"age":25,"name":"John"}",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -20512,18 +20200,10 @@ exports[`chat-completions → responses > textFormatJsonSchemaWithDescriptionPar
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "{"age":25,"name":"John"}",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -20570,18 +20250,10 @@ exports[`chat-completions → responses > textFormatTextParam > response 1`] = `
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Hello! 👋 How can I help you today?",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -20647,14 +20319,6 @@ exports[`chat-completions → responses > toolCallRequest > response 1`] = `
         "annotations": [],
         "reasoning": "",
         "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "tool_calls",
-      "index": 1,
-      "message": {
-        "annotations": [],
-        "role": "assistant",
         "tool_calls": [
           {
             "function": {
@@ -20733,14 +20397,6 @@ exports[`chat-completions → responses > toolChoiceRequiredParam > response 1`]
         "annotations": [],
         "reasoning": "",
         "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "tool_calls",
-      "index": 1,
-      "message": {
-        "annotations": [],
-        "role": "assistant",
         "tool_calls": [
           {
             "function": {
@@ -20822,14 +20478,6 @@ exports[`chat-completions → responses > toolChoiceRequiredWithReasoningParam >
         "annotations": [],
         "reasoning": "",
         "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "tool_calls",
-      "index": 1,
-      "message": {
-        "annotations": [],
-        "role": "assistant",
         "tool_calls": [
           {
             "function": {
@@ -20880,18 +20528,10 @@ exports[`chat-completions → responses > topPParam > response 1`] = `
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Hi there! How can I help you today?",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -20933,18 +20573,10 @@ exports[`chat-completions → responses > topPReasoningModelParam > response 1`]
     {
       "finish_reason": "stop",
       "index": 0,
-      "message": {
-        "annotations": [],
-        "reasoning": "",
-        "role": "assistant",
-      },
-    },
-    {
-      "finish_reason": "stop",
-      "index": 1,
       "message": {
         "annotations": [],
         "content": "Hi there! How can I help today?",
+        "reasoning": "",
         "role": "assistant",
       },
     },
@@ -26209,15 +25841,6 @@ exports[`google → responses > complexReasoningRequest > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "Total digits shown over a full day (00:00 to 23:59) are 24 hours × 60 minutes × 4 digits = 5,760 digits.
 
@@ -26251,7 +25874,7 @@ So:
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -26307,15 +25930,6 @@ exports[`google → responses > exclusiveMinimumToolParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "functionCall": {
               "args": {
@@ -26328,7 +25942,7 @@ exports[`google → responses > exclusiveMinimumToolParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -26366,15 +25980,6 @@ exports[`google → responses > googleOpenAIModelTopKParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "An API gateway acts as a single entry point that handles authentication, rate limiting, and routing for backend services.",
           },
@@ -26382,7 +25987,7 @@ exports[`google → responses > googleOpenAIModelTopKParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -26515,15 +26120,6 @@ exports[`google → responses > googleThinkingJsonSchemaParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "{"confidence":0.0,"recommendation":"Highlight price‑performance tradeoffs between the mics and invite viewers to share their own outdoor setups to boost engagement.","topic":"Mic setup comparison and outdoor performance with audience engagement"}",
           },
@@ -26531,7 +26127,7 @@ exports[`google → responses > googleThinkingJsonSchemaParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -26599,15 +26195,6 @@ exports[`google → responses > googleToolCallThoughtSignatureReplayParam > resp
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "The collections in mydb are:
 - movies
@@ -26619,7 +26206,7 @@ Would you like any details from these collections (e.g., document counts or samp
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -26685,15 +26272,6 @@ exports[`google → responses > googleToolSchemaNumericInt64Param > response 1`]
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "Here are the bounds the tool schema enforces:
 
@@ -26717,7 +26295,7 @@ Please provide values for index_name and tags (an array of strings), and I’ll
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -26754,15 +26332,6 @@ exports[`google → responses > imageConfigParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "Here are a couple of simple ways to render a tiny red dot.
 
@@ -26778,7 +26347,7 @@ If you had a different size or format in mind (PNG, data URL, etc.), tell me and
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -26824,15 +26393,6 @@ exports[`google → responses > imageUrlMimeTypeFallbackParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "A cute tabby cat lies stretched out on a wooden surface, facing the camera. It has striped brown-gray fur, large amber eyes, and long white whiskers. Its front paws are extended forward, and its head is slightly tilted to the side, with a soft, indoor background blurred behind it.",
           },
@@ -26840,7 +26400,7 @@ exports[`google → responses > imageUrlMimeTypeFallbackParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -26877,15 +26437,6 @@ exports[`google → responses > instructionsParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "Hi there! How can I help today? I can answer questions, explain concepts, draft or edit text, brainstorm ideas, help with code, translate, summarize, plan things, or analyze images. Tell me what you’d like to do or what you’re curious about.",
           },
@@ -26893,7 +26444,7 @@ exports[`google → responses > instructionsParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -27199,15 +26750,6 @@ exports[`google → responses > maxCompletionTokensParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "Ok.",
           },
@@ -27215,7 +26757,7 @@ exports[`google → responses > maxCompletionTokensParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -27252,15 +26794,6 @@ exports[`google → responses > mediaResolutionParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "I can’t see an image attached. Please upload the image or share a link, and I’ll give a brief description (1–2 sentences) focusing on the main subject, setting, and mood.",
           },
@@ -27268,7 +26801,7 @@ exports[`google → responses > mediaResolutionParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -27401,15 +26934,6 @@ exports[`google → responses > parallelToolCallsRequest > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "Here’s the current weather:
 
@@ -27422,7 +26946,7 @@ Want a 7-day forecast or a weather alert for either city?",
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -27462,15 +26986,6 @@ exports[`google → responses > reasoningEffortLowParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "4 (in base-10 arithmetic).",
           },
@@ -27478,7 +26993,7 @@ exports[`google → responses > reasoningEffortLowParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -27515,15 +27030,6 @@ exports[`google → responses > reasoningRequest > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "Step-by-step:
 
@@ -27539,7 +27045,7 @@ Answer: 200/3 mph (about 66.67 mph)",
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -27621,15 +27127,6 @@ exports[`google → responses > reasoningSummaryParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "4",
           },
@@ -27637,7 +27134,7 @@ exports[`google → responses > reasoningSummaryParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -27674,15 +27171,6 @@ exports[`google → responses > reasoningWithOutput > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "On a clear day, the sky usually looks blue. This is because sunlight is scattered by the Earth's atmosphere, and blue light scatters more than other colors.
 
@@ -27696,7 +27184,7 @@ The color can change:
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -27733,15 +27221,6 @@ exports[`google → responses > responseModalitiesAudioParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "Hello! It’s wonderful to meet you.",
           },
@@ -27749,7 +27228,7 @@ exports[`google → responses > responseModalitiesAudioParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -27786,15 +27265,6 @@ exports[`google → responses > seedParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "7",
           },
@@ -27802,7 +27272,7 @@ exports[`google → responses > seedParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -27839,15 +27309,6 @@ exports[`google → responses > simpleRequest > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "Paris.",
           },
@@ -27855,7 +27316,7 @@ exports[`google → responses > simpleRequest > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -27933,15 +27394,6 @@ exports[`google → responses > speechConfigParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "Hello! It’s wonderful to meet you.",
           },
@@ -27949,7 +27401,7 @@ exports[`google → responses > speechConfigParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -27986,15 +27438,6 @@ exports[`google → responses > stopSequencesParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20",
           },
@@ -28002,7 +27445,7 @@ exports[`google → responses > stopSequencesParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
     },
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@@ -28081,15 +27524,6 @@ exports[`google → responses > temperatureParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "Hi there! 👋 How can I help today?",
           },
@@ -28097,7 +27531,7 @@ exports[`google → responses > temperatureParam > response 1`] = `
         "role": "model",
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       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
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@@ -28139,15 +27573,6 @@ exports[`google → responses > textFormatJsonObjectParam > response 1`] = `
             "text": "",
             "thought": true,
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-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "{"status": "ok"}",
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@@ -28155,7 +27580,7 @@ exports[`google → responses > textFormatJsonObjectParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
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@@ -28214,15 +27639,6 @@ exports[`google → responses > textFormatJsonSchemaParam > response 1`] = `
             "text": "",
             "thought": true,
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-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
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           {
             "text": "{"age":25,"name":"John"}",
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@@ -28230,7 +27646,7 @@ exports[`google → responses > textFormatJsonSchemaParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
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@@ -28289,15 +27705,6 @@ exports[`google → responses > textFormatJsonSchemaWithDescriptionParam > respo
             "text": "",
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-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "{"age":25,"name":"John"}",
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@@ -28305,7 +27712,7 @@ exports[`google → responses > textFormatJsonSchemaWithDescriptionParam > respo
         "role": "model",
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       "finishReason": "STOP",
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+      "index": 0,
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@@ -28345,15 +27752,6 @@ exports[`google → responses > thinkingLevelParam > response 1`] = `
             "text": "",
             "thought": true,
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-        ],
-        "role": "model",
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-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "I’m ready to help, but I don’t see the problem statement yet. Please share one of the following:
 
@@ -28377,7 +27775,7 @@ If you can’t share the problem statement, you can still describe it (in your o
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
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@@ -28434,15 +27832,6 @@ exports[`google → responses > toolCallRequest > response 1`] = `
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             "thought": true,
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-        ],
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@@ -28455,7 +27844,7 @@ exports[`google → responses > toolCallRequest > response 1`] = `
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       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
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@@ -28511,15 +27900,6 @@ exports[`google → responses > toolChoiceAnyParam > response 1`] = `
             "text": "",
             "thought": true,
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@@ -28532,7 +27912,7 @@ exports[`google → responses > toolChoiceAnyParam > response 1`] = `
         "role": "model",
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       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
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@@ -28588,15 +27968,6 @@ exports[`google → responses > toolChoiceAutoParam > response 1`] = `
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             "thought": true,
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-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
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-    {
-      "content": {
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             "text": "Sure—what location would you like the weather for? Please specify a city (and country if needed) or a ZIP/postal code.
 
@@ -28610,7 +27981,7 @@ If you just want the current weather for your area, share your location and I’
         "role": "model",
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       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
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@@ -28666,15 +28037,6 @@ exports[`google → responses > toolChoiceNoneParam > response 1`] = `
             "text": "",
             "thought": true,
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-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "I can’t access live weather data right now. Tell me:
 
@@ -28688,7 +28050,7 @@ If you’d like, I can guide you to check it quickly on your phone or computer u
         "role": "model",
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       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
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@@ -28747,15 +28109,6 @@ exports[`google → responses > toolChoiceRequiredParam > response 1`] = `
             "text": "",
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@@ -28768,7 +28121,7 @@ exports[`google → responses > toolChoiceRequiredParam > response 1`] = `
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-      "index": 1,
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@@ -28830,15 +28183,6 @@ exports[`google → responses > toolChoiceRequiredWithReasoningParam > response
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@@ -28851,7 +28195,7 @@ exports[`google → responses > toolChoiceRequiredWithReasoningParam > response
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+      "index": 0,
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@@ -28907,15 +28251,6 @@ exports[`google → responses > toolModeValidatedParam > response 1`] = `
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             "thought": true,
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@@ -28928,7 +28263,7 @@ exports[`google → responses > toolModeValidatedParam > response 1`] = `
         "role": "model",
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+      "index": 0,
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@@ -28965,15 +28300,6 @@ exports[`google → responses > topKParam > response 1`] = `
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             "thought": true,
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-        "role": "model",
-      },
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-      "index": 0,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "Hi there! How can I help you today?",
           },
@@ -28981,7 +28307,7 @@ exports[`google → responses > topKParam > response 1`] = `
         "role": "model",
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       "finishReason": "STOP",
-      "index": 1,
+      "index": 0,
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   "modelVersion": "gpt-5-nano-2025-08-07",
@@ -29018,15 +28344,6 @@ exports[`google → responses > topPParam > response 1`] = `
             "text": "",
             "thought": true,
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-      },
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-    {
-      "content": {
-        "parts": [
           {
             "text": "Hi there! 👋 How can I help you today?",
           },
@@ -29034,7 +28351,7 @@ exports[`google → responses > topPParam > response 1`] = `
         "role": "model",
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-      "index": 1,
+      "index": 0,
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@@ -29076,15 +28393,6 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
             "text": "",
             "thought": true,
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@@ -29109,7 +28417,7 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
         "role": "model",
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@@ -29118,15 +28426,6 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
             "text": "",
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@@ -29145,7 +28444,7 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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@@ -29154,15 +28453,6 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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             "thought": true,
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@@ -29187,7 +28477,7 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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@@ -29196,15 +28486,6 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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@@ -29223,7 +28504,7 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
         "role": "model",
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-      "index": 7,
+      "index": 3,
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@@ -29232,15 +28513,6 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
             "text": "",
             "thought": true,
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@@ -29259,7 +28531,7 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
         "role": "model",
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@@ -29268,15 +28540,6 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
             "text": "",
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@@ -29299,7 +28562,7 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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@@ -29308,15 +28571,6 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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             "thought": true,
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@@ -29335,7 +28589,7 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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@@ -29344,15 +28598,6 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
             "text": "",
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@@ -29375,7 +28620,7 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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-      "index": 15,
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@@ -29384,15 +28629,6 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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             "thought": true,
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@@ -29411,7 +28647,7 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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@@ -29420,15 +28656,6 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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@@ -29447,7 +28674,7 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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@@ -29456,15 +28683,6 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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@@ -29483,7 +28701,7 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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@@ -29492,15 +28710,6 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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@@ -29519,7 +28728,7 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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@@ -29528,15 +28737,6 @@ exports[`google → responses > webSearchToolAdvancedParam > response 1`] = `
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             "text": "Here are some notable AI news items in early 2026 (with exact dates for clarity). Want deeper details on any item?
 
@@ -29577,7 +28777,7 @@ If you’d like, I can:
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@@ -29619,15 +28819,6 @@ exports[`google → responses > webSearchToolParam > response 1`] = `
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@@ -29652,7 +28843,7 @@ exports[`google → responses > webSearchToolParam > response 1`] = `
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@@ -29661,15 +28852,6 @@ exports[`google → responses > webSearchToolParam > response 1`] = `
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@@ -29692,7 +28874,7 @@ exports[`google → responses > webSearchToolParam > response 1`] = `
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     },
     {
       "content": {
@@ -29701,15 +28883,6 @@ exports[`google → responses > webSearchToolParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 4,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "functionCall": {
               "args": {
@@ -29732,7 +28905,7 @@ exports[`google → responses > webSearchToolParam > response 1`] = `
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 5,
+      "index": 2,
     },
     {
       "content": {
@@ -29741,15 +28914,6 @@ exports[`google → responses > webSearchToolParam > response 1`] = `
             "text": "",
             "thought": true,
           },
-        ],
-        "role": "model",
-      },
-      "finishReason": "STOP",
-      "index": 6,
-    },
-    {
-      "content": {
-        "parts": [
           {
             "text": "Here are the latest OpenAI news highlights as of today, April 7, 2026. If you want deeper details on any item, I can pull up the full article or official post.
 
@@ -29770,7 +28934,7 @@ If you’d like, I can pull the exact blog posts or press releases for any of th
         "role": "model",
       },
       "finishReason": "STOP",
-      "index": 7,
+      "index": 3,
     },
   ],
   "modelVersion": "gpt-5-nano-2025-08-07",
diff --git a/payloads/scripts/transforms/capture-transforms.ts b/payloads/scripts/transforms/capture-transforms.ts
index b73af721..4060ffe3 100644
--- a/payloads/scripts/transforms/capture-transforms.ts
+++ b/payloads/scripts/transforms/capture-transforms.ts
@@ -342,9 +342,13 @@ export async function captureTransforms(
             targetModel
           ) as Record<string, unknown>;
 
-          const streamResponse = await callProvider(captureProvider, streamRequest, {
-            stream: true,
-          });
+          const streamResponse = await callProvider(
+            captureProvider,
+            streamRequest,
+            {
+              stream: true,
+            }
+          );
           const chunks = await collectStreamChunks(streamResponse);
 
           writeFileSync(streamingPath, JSON.stringify(chunks, null, 2));