release: 3.16.0

[openai-sdks]

Automated Release PR

3.16.0 (2026-09-18)

Features

• api: add webhook endpoint management (#3892) (9a11f6e)

Chores

• api: deprecate MCP connector_id (#3894) (1ccaf07)

---

This PR was generated with Release Please. See documentation.

[openai-sdks]

OkTest Summary

✅ 236/236 SDK tests passed in 11.056s for Python SDK PR #3893.

Test results — 42 files

Test	Result	Time
tests/chat-completions-complex-body.test.ts	✅ Passed	136ms
tests/chat-completions-create.test.ts	✅ Passed	219ms
tests/chat-completions-stream.test.ts	✅ Passed	144ms
tests/files-content-binary.test.ts	✅ Passed	202ms
tests/files-create-multipart.test.ts	✅ Passed	206ms
tests/files-list-pagination.test.ts	✅ Passed	159ms
tests/initialize-config.test.ts	✅ Passed	237ms
tests/instance-isolation.test.ts	✅ Passed	192ms
tests/models-list.test.ts	✅ Passed	232ms
tests/responses-background-lifecycle.test.ts	✅ Passed	284ms
tests/responses-body-method-errors.test.ts	✅ Passed	325ms
tests/responses-cancel-timeout.test.ts	✅ Passed	228ms
tests/responses-cancel.test.ts	✅ Passed	223ms
tests/responses-compact-retries.test.ts	✅ Passed	333ms
tests/responses-compact.test.ts	✅ Passed	272ms
tests/responses-create-advanced-stream.test.ts	✅ Passed	123ms
tests/responses-create-advanced.test.ts	✅ Passed	210ms
tests/responses-create-disconnect.test.ts	✅ Passed	1.188s
tests/responses-create-errors.test.ts	✅ Passed	194ms
tests/responses-create-malformed-api-responses.test.ts	✅ Passed	387ms
tests/responses-create-retries.test.ts	✅ Passed	219ms
tests/responses-create-stream-failures.test.ts	✅ Passed	239ms
tests/responses-create-stream-timeout.test.ts	✅ Passed	210ms
tests/responses-create-stream-wire.test.ts	✅ Passed	3.66s
tests/responses-create-stream.test.ts	✅ Passed	342ms
tests/responses-create-terminal-states.test.ts	✅ Passed	245ms
tests/responses-create-timeout.test.ts	✅ Passed	212ms
tests/responses-create.test.ts	✅ Passed	267ms
tests/responses-delete.test.ts	✅ Passed	203ms
tests/responses-input-items-errors.test.ts	✅ Passed	262ms
tests/responses-input-items-list.test.ts	✅ Passed	285ms
tests/responses-input-items-options.test.ts	✅ Passed	272ms
tests/responses-input-tokens-count-timeout.test.ts	✅ Passed	234ms
tests/responses-input-tokens-count.test.ts	✅ Passed	235ms
tests/responses-malformed-inputs.test.ts	✅ Passed	2.73s
tests/responses-not-found-errors.test.ts	✅ Passed	238ms
tests/responses-parse.test.ts	✅ Passed	383ms
tests/responses-retrieve-retries.test.ts	✅ Passed	254ms
tests/responses-retrieve.test.ts	✅ Passed	229ms
tests/responses-stored-method-errors.test.ts	✅ Passed	513ms
tests/retry-behavior.test.ts	✅ Passed	3.157s
tests/sdk-error-shape.test.ts	✅ Passed	249ms

View OkTest run #35313430009

_{SDK merge (25d0710b3e52) · head (5f9d2ee3799e) · base (1ccaf07fb9a4) · OkTest (cdb90acd46e5)}

[github-actions]

Castiron custom code

✅ No new custom-code files detected.

47 mixed files remain; 0 existing customizations changed.

Compared 1ccaf07fb9a4 → 5f9d2ee3799e. 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 35313480419 --repo openai/openai-python \
  --name castiron-custom-code-35313480419-1 --dir /tmp/castiron-custom-code-35313480419-1
git apply --stat /tmp/castiron-custom-code-35313480419-1/custom-code.patch
cat /tmp/castiron-custom-code-35313480419-1/custom-code.patch

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

git fetch --no-tags origin 1ccaf07fb9a4d1a2be9d97c77604ce75214a9940 5f9d2ee3799e5d9f15732f3645e1d318012dbe01
python3 scripts/castiron/custom_code_report.py report \
  --base 1ccaf07fb9a4d1a2be9d97c77604ce75214a9940 \
  --head 5f9d2ee3799e5d9f15732f3645e1d318012dbe01 --fetch --require-head-hash --public \
  --out /tmp/castiron-custom-code-5f9d2ee3799e
cat /tmp/castiron-custom-code-5f9d2ee3799e/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]

🤖 Created releases:

• v3.16.0

🌻