---
title: "Changes to Speech"
method: POST
path: "/v1/audio/speech"
---

# Changes to Speech

`POST /v1/audio/speech`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 1 of 3 revisions.

- **2026-07-26** `933c4ebdcd72` — 1 breaking, 1 info

## Changes

- **2026-07-26** `933c4ebdcd72` — 1 breaking, 1 info
  - the `ref_audio/anyOf[subschema #2]/` request property contentMediaType changed from `application/octet-stream` to ``
  - added the new optional request property `prompt_cache_key`

---

[Operation](https://skmtc.dev/mistral/apis/mistral-ai-api/docs/v1/audio/speech/post.md) · [API](https://skmtc.dev/mistral/apis/mistral-ai-api.md) · [Page](https://skmtc.dev/mistral/apis/mistral-ai-api/changes/v1/audio/speech/post)