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openrouter-python-sdk-retry…/docs/components/chatstreamchoice.mdx

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---
title: "ChatStreamChoice"
---
Streaming completion choice chunk
## Fields
| Field | Type | Required | Description | Example |
| ------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------ |
| `delta` | [components.ChatStreamDelta](../components/chatstreamdelta.mdx) | :heavy_check_mark: | Delta changes in streaming response | \{<br/>"content": "Hello",<br/>"role": "assistant"<br/>} |
| `finish_reason` | [Nullable[components.ChatFinishReasonEnum]](../components/chatfinishreasonenum.mdx) | :heavy_check_mark: | N/A | stop |
| `index` | *int* | :heavy_check_mark: | Choice index | 0 |
| `logprobs` | [OptionalNullable[components.ChatTokenLogprobs]](../components/chattokenlogprobs.mdx) | :heavy_minus_sign: | Log probabilities for the completion | \{<br/>"content": [<br/>\{<br/>"bytes": null,<br/>"logprob": -0.612345,<br/>"token": " Hello",<br/>"top_logprobs": []<br/>}<br/>],<br/>"refusal": null<br/>} |