---
title: "Changes to OpenAI-compatible chat endpoint"
method: POST
path: "/v1/chat/completions"
---

# Changes to OpenAI-compatible chat endpoint

`POST /v1/chat/completions`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 3 of 7 revisions.

- **2025-05-17** `4227e796ee0b`: 2 breaking, 2 warning
- **2025-05-17** `23cf55a1da8a`: 3 breaking, 2 warning, 1 info
- **2025-05-16** `8fa1d4aa9217`: 5 breaking, 2 warning, 1 info

## Changes

- **2025-05-17** `4227e796ee0b`: 2 breaking, 2 warning
  - the `messages/items/content/anyOf[subschema #2]/items/anyOf[subschema #3: NIMVLMChatCompletionContentPartVideo]/video` request property type changed from `object` to `string`
  - the `messages/items/content/anyOf[subschema #2]/items/anyOf[subschema #4: NIMVLMChatCompletionContentPartVideoStreaming]/video_url` request property type changed from `object` to no type
  - removed the request property `messages/items/content/anyOf[subschema #2]/items/anyOf[subschema #3: NIMVLMChatCompletionContentPartVideo]/video/url`
  - removed the request property `messages/items/content/anyOf[subschema #2]/items/anyOf[subschema #4: NIMVLMChatCompletionContentPartVideoStreaming]/video_url/url`
- **2025-05-17** `23cf55a1da8a`: 3 breaking, 2 warning, 1 info
  - added the new required request property `messages/items/content/anyOf[subschema #2]/items/anyOf[subschema #1: NIMVLMChatCompletionContentPartImage]/image`
  - the `type` request property const value changed from `image_url` to `image`
  - the `type` request property const value changed from `video_url` to `video`
  - removed the request property `messages/items/content/anyOf[subschema #2]/items/anyOf[subschema #1: NIMVLMChatCompletionContentPartImage]/image_url`
  - removed the request property `messages/items/content/anyOf[subschema #2]/items/anyOf[subschema #3: NIMVLMChatCompletionContentPartVideo]/video_url`
  - added the new optional request property `messages/items/content/anyOf[subschema #2]/items/anyOf[subschema #3: NIMVLMChatCompletionContentPartVideo]/video`
- **2025-05-16** `8fa1d4aa9217`: 5 breaking, 2 warning, 1 info
  - added the new required request property `messages/items/content/anyOf[subschema #2]/items/anyOf[subschema #1: NIMVLMChatCompletionContentPartImage]/image_url`
  - added the new required request property `messages/items/content/anyOf[subschema #2]/items/anyOf[subschema #4: NIMVLMChatCompletionContentPartVideoStreaming]/video_url/url`
  - the `type` request property const value changed from `image` to `image_url`
  - the `type` request property const value changed from `video` to `video_url`
  - the `messages/items/content/anyOf[subschema #2]/items/anyOf[subschema #4: NIMVLMChatCompletionContentPartVideoStreaming]/video_url` request property type changed from no type to `object`
  - removed the request property `messages/items/content/anyOf[subschema #2]/items/anyOf[subschema #1: NIMVLMChatCompletionContentPartImage]/image`
  - removed the request property `messages/items/content/anyOf[subschema #2]/items/anyOf[subschema #3: NIMVLMChatCompletionContentPartVideo]/video`
  - added the new optional request property `messages/items/content/anyOf[subschema #2]/items/anyOf[subschema #3: NIMVLMChatCompletionContentPartVideo]/video_url`

---

[Operation](https://skmtc.dev/nvidia/apis/nvidia-nim-for-vlms/docs/v1/chat/completions/post.md) - [API](https://skmtc.dev/nvidia/apis/nvidia-nim-for-vlms.md) - [Page](https://skmtc.dev/nvidia/apis/nvidia-nim-for-vlms/changes/v1/chat/completions/post)