> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-7021d5f4.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# ChatStreamingChoice - Python SDK

> ChatStreamingChoice method reference

<Warning>
  The Python SDK and docs are currently in beta.
  Report issues on [GitHub](https://github.com/OpenRouterTeam/python-sdk/issues).
</Warning>

## Fields

| Field           | Type                                                                                                 | Required             | Description |
| --------------- | ---------------------------------------------------------------------------------------------------- | -------------------- | ----------- |
| `delta`         | [components.ChatStreamingMessageChunk](/client-sdks/python/components/chatstreamingmessagechunk)     | :heavy\_check\_mark: | N/A         |
| `finish_reason` | [Nullable\[components.ChatCompletionFinishReason\]](../components/chatcompletionfinishreason.md)     | :heavy\_check\_mark: | N/A         |
| `index`         | *float*                                                                                              | :heavy\_check\_mark: | N/A         |
| `logprobs`      | [OptionalNullable\[components.ChatMessageTokenLogprobs\]](../components/chatmessagetokenlogprobs.md) | :heavy\_minus\_sign: | N/A         |