chore(api): clarify documented API error responses

[markstuart-oai]

Summary

Clarifies documented error responses for Python users without changing existing client behavior.

Changes

• Document applicable errors across organization, inference, media and resource APIs.
• Preserve existing public methods, exception types and runtime behavior.

[github-actions]

Castiron custom code

✅ No new custom-code files detected.

47 mixed files remain; 0 existing customizations changed.

Compared 5d4003c12d5d → dcec5b136841. Generated baselines verified.

47 existing customizations unchanged

• api.md
• scripts/castiron/README.md
• scripts/castiron/custom_code_report.py
• scripts/castiron/test_custom_code_report.py
• src/openai/init.py
• src/openai/_client.py
• src/openai/resources/audio/transcriptions.py
• src/openai/resources/audio/translations.py
• src/openai/resources/beta/agents/sessions/sessions.py
• src/openai/resources/beta/beta.py
• src/openai/resources/beta/responses/responses.py
• src/openai/resources/beta/threads/runs/runs.py
• src/openai/resources/beta/threads/threads.py
• src/openai/resources/chat/completions/completions.py
• src/openai/resources/embeddings.py
• src/openai/resources/files.py
• src/openai/resources/live/forks.py
• src/openai/resources/live/live.py
• src/openai/resources/live/sideband.py
• src/openai/resources/realtime/api.md
• src/openai/resources/realtime/realtime.py
• src/openai/resources/responses/responses.py
• src/openai/resources/uploads/uploads.py
• src/openai/resources/vector_stores/file_batches.py
• src/openai/resources/vector_stores/files.py
• src/openai/resources/videos.py
• src/openai/resources/webhooks/init.py
• src/openai/resources/webhooks/webhooks.py
• src/openai/types/beta/agent_session_message.py
• src/openai/types/chat/init.py
• src/openai/types/chat/chat_completion_message_tool_call.py
• src/openai/types/fine_tuning/fine_tuning_job_integration.py
• src/openai/types/realtime/conversation_item_input_audio_transcription_delta_event.py
• src/openai/types/realtime/realtime_error_event.py
• src/openai/types/responses/init.py
• src/openai/types/responses/response.py
• src/openai/types/responses/response_function_web_search.py
• src/openai/types/responses/response_function_web_search_param.py
• src/openai/types/responses/responses_client_event.py
• src/openai/types/responses/responses_client_event_param.py

7 more in the full report.

A changed generated baseline means this report cannot reliably identify which handwritten lines changed.

Inspect the custom-code diff

Download the exact patch produced by this run (requires repository access):

gh run download 36188751248 --repo openai/openai-python \
  --name castiron-custom-code-36188751248-1 --dir /tmp/castiron-custom-code-36188751248-1
git apply --stat /tmp/castiron-custom-code-36188751248-1/custom-code.patch
cat /tmp/castiron-custom-code-36188751248-1/custom-code.patch

Or reproduce it from an SDK checkout containing the vendored reporter:

git fetch --no-tags origin 5d4003c12d5df5a5faed35971cac3bcb711fdf7d dcec5b136841a9735f574c3854258b0fa91176c1
python3 scripts/castiron/custom_code_report.py report \
  --base 5d4003c12d5df5a5faed35971cac3bcb711fdf7d \
  --head dcec5b136841a9735f574c3854258b0fa91176c1 --fetch --require-head-hash --public \
  --out /tmp/castiron-custom-code-dcec5b136841
cat /tmp/castiron-custom-code-dcec5b136841/custom-code.patch

This is the current full custom patch for mixed files, not an attribution of only the handwritten lines changed by this PR.

Full report and patch

[openai-sdks]

OkTest Summary

✅ 236/236 SDK tests passed in 7.862s for Python SDK PR #3965.

Test results — 42 files

Test	Result	Time
tests/chat-completions-complex-body.test.ts	✅ Passed	168ms
tests/chat-completions-create.test.ts	✅ Passed	126ms
tests/chat-completions-stream.test.ts	✅ Passed	108ms
tests/files-content-binary.test.ts	✅ Passed	181ms
tests/files-create-multipart.test.ts	✅ Passed	148ms
tests/files-list-pagination.test.ts	✅ Passed	97ms
tests/initialize-config.test.ts	✅ Passed	99ms
tests/instance-isolation.test.ts	✅ Passed	81ms
tests/models-list.test.ts	✅ Passed	85ms
tests/responses-background-lifecycle.test.ts	✅ Passed	121ms
tests/responses-body-method-errors.test.ts	✅ Passed	223ms
tests/responses-cancel-timeout.test.ts	✅ Passed	159ms
tests/responses-cancel.test.ts	✅ Passed	126ms
tests/responses-compact-retries.test.ts	✅ Passed	215ms
tests/responses-compact.test.ts	✅ Passed	187ms
tests/responses-create-advanced-stream.test.ts	✅ Passed	63ms
tests/responses-create-advanced.test.ts	✅ Passed	170ms
tests/responses-create-disconnect.test.ts	✅ Passed	1.042s
tests/responses-create-errors.test.ts	✅ Passed	112ms
tests/responses-create-malformed-api-responses.test.ts	✅ Passed	74ms
tests/responses-create-retries.test.ts	✅ Passed	381ms
tests/responses-create-stream-failures.test.ts	✅ Passed	77ms
tests/responses-create-stream-timeout.test.ts	✅ Passed	175ms
tests/responses-create-stream-wire.test.ts	✅ Passed	2.356s
tests/responses-create-stream.test.ts	✅ Passed	232ms
tests/responses-create-terminal-states.test.ts	✅ Passed	154ms
tests/responses-create-timeout.test.ts	✅ Passed	175ms
tests/responses-create.test.ts	✅ Passed	136ms
tests/responses-delete.test.ts	✅ Passed	119ms
tests/responses-input-items-errors.test.ts	✅ Passed	305ms
tests/responses-input-items-list.test.ts	✅ Passed	207ms
tests/responses-input-items-options.test.ts	✅ Passed	218ms
tests/responses-input-tokens-count-timeout.test.ts	✅ Passed	183ms
tests/responses-input-tokens-count.test.ts	✅ Passed	118ms
tests/responses-malformed-inputs.test.ts	✅ Passed	1.578s
tests/responses-not-found-errors.test.ts	✅ Passed	163ms
tests/responses-parse.test.ts	✅ Passed	145ms
tests/responses-retrieve-retries.test.ts	✅ Passed	124ms
tests/responses-retrieve.test.ts	✅ Passed	145ms
tests/responses-stored-method-errors.test.ts	✅ Passed	430ms
tests/retry-behavior.test.ts	✅ Passed	3.084s
tests/sdk-error-shape.test.ts	✅ Passed	257ms

View OkTest run #36188722944

_{SDK merge (968b5443a040) · head (dcec5b136841) · base (5d4003c12d5d) · OkTest (f9111d4e2fcd)}

[markstuart-oai]

Thanks for reviewing. The approved head is unchanged and still contains only the error-reference update and generation metadata; existing client APIs, exception types and runtime behavior are preserved.