release: 4.51.0

[github-actions]

Automated Release PR

4.51.0 (2026-08-13)

Features

• api: Add GPT_DAYBREAK and GPT_5_6_CYBER model identifiers (5b9ba3a)
• api: add workload identity access token issued event (#859) (2b763fe)

Bug Fixes

• api: Add GPT_DAYBREAK and GPT_5_6_CYBER model identifiers (#856) (5b9ba3a)
• api: clarify audio upload metadata requirements (#857) (593f04c)
• restore ProGuard configuration caching (#842) (fb8daa4)

Chores

• api: Update generated file header text (#846) (d11a357)
• remove Stainless attribution and infrastructure (#858) (942a097)

Documentation

• keep README badges on latest release (#839) (33c6b57)

---

This PR was generated with Release Please. See documentation.

[openai-sdks]

OkTest Summary

✅ 237/237 SDK tests passed in 16.572s for Java SDK PR #844.

Test results — 42 files

Test	Result	Time
tests/chat-completions-complex-body.test.ts	✅ Passed	220ms
tests/chat-completions-create.test.ts	✅ Passed	589ms
tests/chat-completions-stream.test.ts	✅ Passed	376ms
tests/files-content-binary.test.ts	✅ Passed	222ms
tests/files-create-multipart.test.ts	✅ Passed	253ms
tests/files-list-pagination.test.ts	✅ Passed	287ms
tests/initialize-config.test.ts	✅ Passed	187ms
tests/instance-isolation.test.ts	✅ Passed	217ms
tests/models-list.test.ts	✅ Passed	195ms
tests/responses-background-lifecycle.test.ts	✅ Passed	288ms
tests/responses-body-method-errors.test.ts	✅ Passed	477ms
tests/responses-cancel-timeout.test.ts	✅ Passed	232ms
tests/responses-cancel.test.ts	✅ Passed	402ms
tests/responses-compact-retries.test.ts	✅ Passed	435ms
tests/responses-compact.test.ts	✅ Passed	283ms
tests/responses-create-advanced-stream.test.ts	✅ Passed	814ms
tests/responses-create-advanced.test.ts	✅ Passed	1.361s
tests/responses-create-disconnect.test.ts	✅ Passed	999ms
tests/responses-create-errors.test.ts	✅ Passed	458ms
tests/responses-create-malformed-api-responses.test.ts	✅ Passed	303ms
tests/responses-create-retries.test.ts	✅ Passed	647ms
tests/responses-create-stream-failures.test.ts	✅ Passed	302ms
tests/responses-create-stream-timeout.test.ts	✅ Passed	323ms
tests/responses-create-stream-wire.test.ts	✅ Passed	6.085s
tests/responses-create-stream.test.ts	✅ Passed	639ms
tests/responses-create-terminal-states.test.ts	✅ Passed	271ms
tests/responses-create-timeout.test.ts	✅ Passed	201ms
tests/responses-create.test.ts	✅ Passed	260ms
tests/responses-delete.test.ts	✅ Passed	258ms
tests/responses-input-items-errors.test.ts	✅ Passed	313ms
tests/responses-input-items-list.test.ts	✅ Passed	319ms
tests/responses-input-items-options.test.ts	✅ Passed	581ms
tests/responses-input-tokens-count-timeout.test.ts	✅ Passed	236ms
tests/responses-input-tokens-count.test.ts	✅ Passed	330ms
tests/responses-malformed-inputs.test.ts	✅ Passed	4.83s
tests/responses-not-found-errors.test.ts	✅ Passed	366ms
tests/responses-parse.test.ts	✅ Passed	847ms
tests/responses-retrieve-retries.test.ts	✅ Passed	340ms
tests/responses-retrieve.test.ts	✅ Passed	278ms
tests/responses-stored-method-errors.test.ts	✅ Passed	939ms
tests/retry-behavior.test.ts	✅ Passed	3.414s
tests/sdk-error-shape.test.ts	✅ Passed	393ms

View OkTest run #31673360211

_{SDK merge (ba911aafee5c) · head (090b5b5400ac) · base (fb8daa45a059) · OkTest (a845fa206fa4)}