release: 4.51.0

[github-actions]

Automated Release PR

4.51.0 (2026-08-11)

Features

• api: Add GPT_DAYBREAK and GPT_5_6_CYBER model identifiers (5b9ba3a)

Bug Fixes

• api: Add GPT_DAYBREAK and GPT_5_6_CYBER model identifiers (#856) (5b9ba3a)
• api: clarify audio upload metadata requirements (#857) (593f04c)

Chores

• api: Update generated file header text (#846) (d11a357)

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 16.597s for Java SDK PR #844.

Test results — 42 files

Test	Result	Time
tests/chat-completions-complex-body.test.ts	✅ Passed	299ms
tests/chat-completions-create.test.ts	✅ Passed	498ms
tests/chat-completions-stream.test.ts	✅ Passed	318ms
tests/files-content-binary.test.ts	✅ Passed	297ms
tests/files-create-multipart.test.ts	✅ Passed	437ms
tests/files-list-pagination.test.ts	✅ Passed	227ms
tests/initialize-config.test.ts	✅ Passed	250ms
tests/instance-isolation.test.ts	✅ Passed	285ms
tests/models-list.test.ts	✅ Passed	251ms
tests/responses-background-lifecycle.test.ts	✅ Passed	356ms
tests/responses-body-method-errors.test.ts	✅ Passed	547ms
tests/responses-cancel-timeout.test.ts	✅ Passed	209ms
tests/responses-cancel.test.ts	✅ Passed	244ms
tests/responses-compact-retries.test.ts	✅ Passed	383ms
tests/responses-compact.test.ts	✅ Passed	231ms
tests/responses-create-advanced-stream.test.ts	✅ Passed	441ms
tests/responses-create-advanced.test.ts	✅ Passed	1.37s
tests/responses-create-disconnect.test.ts	✅ Passed	1.094s
tests/responses-create-errors.test.ts	✅ Passed	342ms
tests/responses-create-malformed-api-responses.test.ts	✅ Passed	295ms
tests/responses-create-retries.test.ts	✅ Passed	293ms
tests/responses-create-stream-failures.test.ts	✅ Passed	194ms
tests/responses-create-stream-timeout.test.ts	✅ Passed	295ms
tests/responses-create-stream-wire.test.ts	✅ Passed	6.426s
tests/responses-create-stream.test.ts	✅ Passed	133ms
tests/responses-create-terminal-states.test.ts	✅ Passed	407ms
tests/responses-create-timeout.test.ts	✅ Passed	230ms
tests/responses-create.test.ts	✅ Passed	818ms
tests/responses-delete.test.ts	✅ Passed	297ms
tests/responses-input-items-errors.test.ts	✅ Passed	316ms
tests/responses-input-items-list.test.ts	✅ Passed	340ms
tests/responses-input-items-options.test.ts	✅ Passed	227ms
tests/responses-input-tokens-count-timeout.test.ts	✅ Passed	240ms
tests/responses-input-tokens-count.test.ts	✅ Passed	313ms
tests/responses-malformed-inputs.test.ts	✅ Passed	5.425s
tests/responses-not-found-errors.test.ts	✅ Passed	401ms
tests/responses-parse.test.ts	✅ Passed	646ms
tests/responses-retrieve-retries.test.ts	✅ Passed	330ms
tests/responses-retrieve.test.ts	✅ Passed	316ms
tests/responses-stored-method-errors.test.ts	✅ Passed	991ms
tests/retry-behavior.test.ts	✅ Passed	3.423s
tests/sdk-error-shape.test.ts	✅ Passed	395ms

View OkTest run #31517291466

_{SDK merge (c4a19bbfeff6) · head (10e53db4ad61) · base (593f04c912d9) · OkTest (91635c6a2723)}