---
title: "Changes to Create speech"
method: POST
path: "/audio/speech"
---

# Changes to Create speech

`POST /audio/speech`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 11 of 163 revisions.

- **2026-09-27** `de263316e28b` — 6 info
- **2026-09-25** `d86203de41ae` — 4 info
- **2026-09-24** `43d3ab828715` — 1 breaking, 1 info
- **2026-09-03** `9430b00d75b4` — 2 info
- **2026-09-03** `5f6acbcbb919` — 1 info
- **2026-08-14** `6ac2618eefd7` — 1 info
- **2026-05-13** `74cbcf73838f` — 1 breaking, 4 info
- **2025-03-22** `41844462b873` — 10 breaking, 3 info
- **2025-01-21** `47138a7dd8b9` — 3 info
- **2025-01-21** `0d83ef8a5f65` — 3 breaking
- **2025-01-17** `88f3bede7665` — 3 info

## Changes

- **2026-09-27** `de263316e28b` — 6 info
  - added the media type `audio/aac` for the response with the status `200`
  - added the media type `audio/flac` for the response with the status `200`
  - added the media type `audio/mpeg` for the response with the status `200`
  - added the media type `audio/opus` for the response with the status `200`
  - added the media type `audio/pcm` for the response with the status `200`
  - added the media type `audio/wav` for the response with the status `200`
- **2026-09-25** `d86203de41ae` — 4 info
  - added the non-success response with the status `400`
  - added the non-success response with the status `401`
  - added the non-success response with the status `403`
  - added the non-success response with the status `500`
- **2026-09-24** `43d3ab828715` — 1 breaking, 1 info
  - removed `#/components/schemas/VoiceIdsShared` from the `voice` request property `anyOf` list
  - added `subschema #1` to the `voice` request property `anyOf` list
- **2026-09-03** `9430b00d75b4` — 2 info
  - added the optional property `error/misalignment` to the response with the `429` status
  - added the optional property `error/misalignment` to the response with the `503` status
- **2026-09-03** `5f6acbcbb919` — 1 info
  - added the non-success response with the status `503`
- **2026-08-14** `6ac2618eefd7` — 1 info
  - added the non-success response with the status `429`
- **2026-05-13** `74cbcf73838f` — 1 breaking, 4 info
  - removed `subschema #1, subschema #2` from the `voice` request property `anyOf` list
  - added the new optional request property `stream_format`
  - added `#/components/schemas/VoiceIdsShared, subschema #2` to the `voice` request property `anyOf` list
  - added the new `gpt-4o-mini-tts-2025-12-15` enum value to the request property `model/anyOf[subschema #2]/`
  - added the media type `text/event-stream` for the response with the status `200`
- **2025-03-22** `41844462b873` — 10 breaking, 3 info
  - removed the enum value `alloy` of the request property `voice`
  - removed the enum value `ash` of the request property `voice`
  - removed the enum value `coral` of the request property `voice`
  - removed the enum value `echo` of the request property `voice`
  - removed the enum value `fable` of the request property `voice`
  - removed the enum value `nova` of the request property `voice`
  - removed the enum value `onyx` of the request property `voice`
  - removed the enum value `sage` of the request property `voice`
  - removed the enum value `shimmer` of the request property `voice`
  - the `voice` request property type changed from `string` to no type
  - added the new optional request property `instructions`
  - added `subschema #1, subschema #2` to the `voice` request property `anyOf` list
  - added the new `gpt-4o-mini-tts` enum value to the request property `model/anyOf[subschema #2]/`
- **2025-01-21** `47138a7dd8b9` — 3 info
  - added the new `ash` enum value to the request property `voice`
  - added the new `coral` enum value to the request property `voice`
  - added the new `sage` enum value to the request property `voice`
- **2025-01-21** `0d83ef8a5f65` — 3 breaking
  - removed the enum value `ash` of the request property `voice`
  - removed the enum value `coral` of the request property `voice`
  - removed the enum value `sage` of the request property `voice`
- **2025-01-17** `88f3bede7665` — 3 info
  - added the new `ash` enum value to the request property `voice`
  - added the new `coral` enum value to the request property `voice`
  - added the new `sage` enum value to the request property `voice`

---

[Operation](https://skmtc.dev/openai/apis/openapi/docs/audio/speech/post.md) · [API](https://skmtc.dev/openai/apis/openapi.md) · [Page](https://skmtc.dev/openai/apis/openapi/changes/audio/speech/post)