---
title: "Changes to Chat Completion"
method: POST
path: "/v1/chat/completions"
---

# Changes to Chat Completion

`POST /v1/chat/completions`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 1 of 3 revisions.

- **2026-08-14** `61436a496404` — 3 info

## Changes

- **2026-08-14** `61436a496404` — 3 info
  - added the new optional request property `service_tier`
  - added the optional property `allOf[#/components/schemas/ChatCompletionResponseBase]/allOf[subschema #1: ResponseBase]/usage/service_tier` to the response with the `200` status (media type: application/json)
  - added the optional property `data/usage/service_tier` to the response with the `200` status (media type: text/event-stream)

---

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