diff --git a/.castiron.stats.yml b/.castiron.stats.yml
index 2ec81f58c1..c1bf184a5a 100644
--- a/.castiron.stats.yml
+++ b/.castiron.stats.yml
@@ -1,8 +1,8 @@
 schema_version: 1
-generation_id: bf7a8dff-eafb-43e0-873c-86458c45c4bc
-openapi_spec_hash: 0ec6a7e693cd01f26722c3dab19fc122
-openapi_transformed_spec_hash: f0b54f1f631dbd006b7768595bcda2d4
+generation_id: 1dd246ed-238d-481d-9649-a93ac4e0d455
+openapi_spec_hash: 91cc2e79b522ef1d5b1d0a7c930b06b2
+openapi_transformed_spec_hash: b081b94fc815ee91ad978e592e233b83
 config_hash: 84cdcc959ee7140cc9a65e9b642c097b
-codegen_sha: d04e68695b3ce0aedd210db03d3a02ec740a3cef
+codegen_sha: de6e1f3fdc3337dd65e009deee8a0e6654912a82
 codegen_hash: 67b5ab20d81c80689a8a857466838278fb0d428d48b3261d2479bab43396d589
-public_codegen_sha: 00b2059284b62aea18c2360ad9cd3ee65a9c12e5
+public_codegen_sha: ee717eb8a6c8891cc8d8bd1f5af1471d3806b213
diff --git a/api_reference/openapi.transformed.yml b/api_reference/openapi.transformed.yml
index fc9cfaa657..7f6cec4af7 100644
--- a/api_reference/openapi.transformed.yml
+++ b/api_reference/openapi.transformed.yml
@@ -1995,6 +1995,20 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/ChatCompletionList'
+        '400':
+          description: Invalid pagination or filter parameters.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          $ref: '#/components/responses/TooManyRequests'
+        '500':
+          description: An internal error prevented the request from being completed.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: chat
         path: list
@@ -2924,6 +2938,20 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/CreateChatCompletionResponse'
+        '404':
+          description: No stored chat completion was found with the specified ID.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          $ref: '#/components/responses/TooManyRequests'
+        '500':
+          description: An internal error prevented the request from being completed.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: chat
         examples:
@@ -3012,6 +3040,26 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/CreateChatCompletionResponse'
+        '400':
+          description: Invalid metadata update.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '404':
+          description: No stored chat completion was found with the specified ID.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          $ref: '#/components/responses/TooManyRequests'
+        '500':
+          description: An internal error prevented the request from being completed.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: chat
         examples:
@@ -3091,6 +3139,20 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/ChatCompletionDeleted'
+        '404':
+          description: No stored chat completion was found with the specified ID.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          $ref: '#/components/responses/TooManyRequests'
+        '500':
+          description: An internal error prevented the request from being completed.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: chat
         examples:
@@ -3160,6 +3222,26 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/ChatCompletionMessageList'
+        '400':
+          description: Invalid message pagination parameters.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '404':
+          description: No stored chat completion was found with the specified ID.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          $ref: '#/components/responses/TooManyRequests'
+        '500':
+          description: An internal error prevented the request from being completed.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: chat
         examples:
@@ -6516,6 +6598,18 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/RunGraderResponse'
+        '400':
+          description: The grader definition or request is invalid.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          description: The request rate limit has been exceeded.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         beta: true
         group: graders
@@ -6747,6 +6841,18 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/ValidateGraderResponse'
+        '400':
+          description: The grader definition or request is invalid.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          description: The request rate limit has been exceeded.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         beta: true
         group: graders
@@ -6830,6 +6936,18 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/ListFineTuningCheckpointPermissionResponse'
+        '400':
+          description: The query parameters are invalid.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          description: The request rate limit has been exceeded.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: fine-tuning
         examples:
@@ -6889,6 +7007,24 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/ListFineTuningCheckpointPermissionResponse'
+        '400':
+          description: The request is invalid or checkpoint permissions cannot be changed for the requested projects or job state.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '404':
+          description: The checkpoint or its fine-tuning job was not found, or the checkpoint cannot be shared.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          description: The request rate limit has been exceeded.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: fine-tuning
         examples:
@@ -6946,6 +7082,24 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/DeleteFineTuningCheckpointPermissionResponse'
+        '400':
+          description: The checkpoint permission cannot be removed for the requested project or job state.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '404':
+          description: The checkpoint, permission, associated project, or fine-tuning job was not found, or the checkpoint cannot be shared.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          description: The request rate limit has been exceeded.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: fine-tuning
         examples:
@@ -6984,6 +7138,18 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/FineTuningJob'
+        '400':
+          description: The request is invalid or the organization does not meet the requirements to create a fine-tuning job.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          description: A request or fine-tuning job limit has been exceeded.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: fine-tuning
         examples:
@@ -7403,6 +7569,18 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/ListPaginatedFineTuningJobsResponse'
+        '400':
+          description: The query parameters are invalid.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          description: The request rate limit has been exceeded.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: fine-tuning
         examples:
@@ -7478,6 +7656,18 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/FineTuningJob'
+        '404':
+          description: The fine-tuning job was not found or is not accessible.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          description: The request rate limit has been exceeded.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: fine-tuning
         examples:
@@ -7561,6 +7751,24 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/FineTuningJob'
+        '400':
+          description: The fine-tuning job cannot be cancelled in its current state.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '404':
+          description: The fine-tuning job was not found or is not accessible.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          description: The request rate limit has been exceeded.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: fine-tuning
         examples:
@@ -7634,6 +7842,24 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/ListFineTuningJobCheckpointsResponse'
+        '400':
+          description: The query parameters are invalid.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '404':
+          description: The fine-tuning job was not found or is not accessible.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          description: The request rate limit has been exceeded.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: fine-tuning
         examples:
@@ -7711,6 +7937,24 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/ListFineTuningJobEventsResponse'
+        '400':
+          description: The query parameters are invalid.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '404':
+          description: The fine-tuning job was not found or is not accessible.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          description: The request rate limit has been exceeded.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: fine-tuning
         examples:
@@ -7789,6 +8033,24 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/FineTuningJob'
+        '400':
+          description: The fine-tuning job cannot be paused in its current state or does not support pausing.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '404':
+          description: The fine-tuning job was not found or is not accessible, or this operation is unavailable.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          description: The request rate limit has been exceeded.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: fine-tuning
         examples:
@@ -7849,6 +8111,24 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/FineTuningJob'
+        '400':
+          description: The fine-tuning job cannot be resumed in its current state or does not support resuming.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '404':
+          description: The fine-tuning job was not found or is not accessible, or this operation is unavailable.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+        '429':
+          description: A request or fine-tuning job limit has been exceeded.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: fine-tuning
         examples:
@@ -8466,6 +8746,12 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/ListModelsResponse'
+        '403':
+          description: The API credential does not have permission to list models.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/PermissionErrorResponse'
       x-oaiMeta:
         group: models
         examples:
@@ -8553,6 +8839,18 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/Model'
+        '403':
+          description: The API credential does not have permission to retrieve models.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/PermissionErrorResponse'
+        '404':
+          description: The model was not found or is not accessible.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: models
         examples:
@@ -8618,6 +8916,18 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/DeleteModelResponse'
+        '403':
+          description: Insufficient permissions to delete the model. Model deletion requires the Owner role in the organization and a credential that permits deletion.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/PermissionErrorResponse'
+        '404':
+          description: The model was not found, is not accessible, or cannot be deleted through this endpoint.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
       x-oaiMeta:
         group: models
         examples: