release: 3.16.1

[openai-sdks]

Automated Release PR

3.16.1 (2026-09-18)

Bug Fixes

• api: avoid loading unrelated API resources on first use (#3898) (68e4317)

---

This PR was generated with Release Please. See documentation.

[github-actions]

Castiron custom code

✅ No new custom-code files detected.

47 mixed files remain; 0 existing customizations changed.

Compared 68e4317aa3df → 9d59095c41f0. 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 35380729213 --repo openai/openai-python \
  --name castiron-custom-code-35380729213-1 --dir /tmp/castiron-custom-code-35380729213-1
git apply --stat /tmp/castiron-custom-code-35380729213-1/custom-code.patch
cat /tmp/castiron-custom-code-35380729213-1/custom-code.patch

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

git fetch --no-tags origin 68e4317aa3df4b6e7a5ea3f75833bdd7d76e447d 9d59095c41f0d54ca6bf0c464044ba990aa274ac
python3 scripts/castiron/custom_code_report.py report \
  --base 68e4317aa3df4b6e7a5ea3f75833bdd7d76e447d \
  --head 9d59095c41f0d54ca6bf0c464044ba990aa274ac --fetch --require-head-hash --public \
  --out /tmp/castiron-custom-code-9d59095c41f0
cat /tmp/castiron-custom-code-9d59095c41f0/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:

• v3.16.1

🌻