---
url: >-
  https://adk.nht.io/api/@nhtio/adk/batteries/llm/openai_chat_completions/types/interfaces/ChatCompletionsChunkChoice.md
description: A choice option in a streaming chat completions chunk.
---

# Interface: ChatCompletionsChunkChoice

Defined in: [src/batteries/llm/openai\_chat\_completions/types.ts:252](https://github.com/NHTIO/ADK/blob/v1.20261003.0/src/src/batteries/llm/openai_chat_completions/types.ts#L252)

A choice option in a streaming chat completions chunk.

## Properties

| Property                                             | Type                                                        | Description                                  | Defined in                                                                                                                                                            |
| ---------------------------------------------------- | ----------------------------------------------------------- | -------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
|  `delta?`                 | [`ChatCompletionsChunkDelta`](ChatCompletionsChunkDelta.md) | The stream delta object.                     | [src/batteries/llm/openai\_chat\_completions/types.ts:260](https://github.com/NHTIO/ADK/blob/v1.20261003.0/src/src/batteries/llm/openai_chat_completions/types.ts#L260) |
|  `finish_reason?` | `string` | `null`                                          | The reason the generation stopped.           | [src/batteries/llm/openai\_chat\_completions/types.ts:264](https://github.com/NHTIO/ADK/blob/v1.20261003.0/src/src/batteries/llm/openai_chat_completions/types.ts#L264) |
|  `index?`                 | `number`                                                    | Index of the choice in the completions list. | [src/batteries/llm/openai\_chat\_completions/types.ts:256](https://github.com/NHTIO/ADK/blob/v1.20261003.0/src/src/batteries/llm/openai_chat_completions/types.ts#L256) |