release: 2.52.0

[stainless-app]

Automated Release PR

2.52.0 (2026-07-31)

Full Changelog: v2.51.0...v2.52.0

Features

• api: content provenance checks (1d6c118)

Bug Fixes

• client: honor Retry-After delays up to two minutes (#3555) (7fa7946)

Documentation

• add API-key mTLS HTTP client recipes (#3552) (7a3d5e4)

---

This pull request is managed by Stainless's GitHub App.

The semver version number is based on included commit messages. Alternatively, you can manually set the version number in the title of this pull request.

For a better experience, it is recommended to use either rebase-merge or squash-merge when merging this pull request.

🔗 Stainless website
📚 Read the docs
🙋 Reach out for help or questions

[openai-sdks]

OkTest Summary

✅ 237/237 SDK tests passed in 11.638s for Python SDK PR #3557.

Test results — 42 files

Test	Result	Time
tests/chat-completions-complex-body.test.ts	✅ Passed	230ms
tests/chat-completions-create.test.ts	✅ Passed	267ms
tests/chat-completions-stream.test.ts	✅ Passed	135ms
tests/files-content-binary.test.ts	✅ Passed	259ms
tests/files-create-multipart.test.ts	✅ Passed	256ms
tests/files-list-pagination.test.ts	✅ Passed	159ms
tests/initialize-config.test.ts	✅ Passed	195ms
tests/instance-isolation.test.ts	✅ Passed	213ms
tests/models-list.test.ts	✅ Passed	211ms
tests/responses-background-lifecycle.test.ts	✅ Passed	274ms
tests/responses-body-method-errors.test.ts	✅ Passed	396ms
tests/responses-cancel-timeout.test.ts	✅ Passed	234ms
tests/responses-cancel.test.ts	✅ Passed	255ms
tests/responses-compact-retries.test.ts	✅ Passed	373ms
tests/responses-compact.test.ts	✅ Passed	287ms
tests/responses-create-advanced-stream.test.ts	✅ Passed	131ms
tests/responses-create-advanced.test.ts	✅ Passed	198ms
tests/responses-create-disconnect.test.ts	✅ Passed	1.366s
tests/responses-create-errors.test.ts	✅ Passed	226ms
tests/responses-create-malformed-api-responses.test.ts	✅ Passed	257ms
tests/responses-create-retries.test.ts	✅ Passed	360ms
tests/responses-create-stream-failures.test.ts	✅ Passed	147ms
tests/responses-create-stream-timeout.test.ts	✅ Passed	237ms
tests/responses-create-stream-wire.test.ts	✅ Passed	3.604s
tests/responses-create-stream.test.ts	✅ Passed	248ms
tests/responses-create-terminal-states.test.ts	✅ Passed	260ms
tests/responses-create-timeout.test.ts	✅ Passed	232ms
tests/responses-create.test.ts	✅ Passed	261ms
tests/responses-delete.test.ts	✅ Passed	289ms
tests/responses-input-items-errors.test.ts	✅ Passed	354ms
tests/responses-input-items-list.test.ts	✅ Passed	319ms
tests/responses-input-items-options.test.ts	✅ Passed	311ms
tests/responses-input-tokens-count-timeout.test.ts	✅ Passed	263ms
tests/responses-input-tokens-count.test.ts	✅ Passed	254ms
tests/responses-malformed-inputs.test.ts	✅ Passed	2.814s
tests/responses-not-found-errors.test.ts	✅ Passed	350ms
tests/responses-parse.test.ts	✅ Passed	379ms
tests/responses-retrieve-retries.test.ts	✅ Passed	274ms
tests/responses-retrieve.test.ts	✅ Passed	250ms
tests/responses-stored-method-errors.test.ts	✅ Passed	734ms
tests/retry-behavior.test.ts	✅ Passed	3.175s
tests/sdk-error-shape.test.ts	✅ Passed	333ms

View OkTest run #30640931978

_{SDK merge (764587110260) · head (e0657723003a) · base (7a3d5e46b61c) · OkTest (91635c6a2723)}

[stainless-app]

🤖 Release is at https://github.com/openai/openai-python/releases/tag/v2.52.0 🌻