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openrouter-python-sdk-retry…/docs/models/chatcompletionchunkchoice.md
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# ChatCompletionChunkChoice
Streaming completion choice chunk
## Fields
| Field | Type | Required | Description |
| ------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------ |
| `delta` | [models.ChatCompletionChunkChoiceDelta](../models/chatcompletionchunkchoicedelta.md) | :heavy_check_mark: | Delta changes in streaming response |
| `finish_reason` | [Nullable[models.ChatCompletionChunkChoiceFinishReason]](../models/chatcompletionchunkchoicefinishreason.md) | :heavy_check_mark: | N/A |
| `index` | *float* | :heavy_check_mark: | N/A |
| `logprobs` | [OptionalNullable[models.ChatCompletionTokenLogprobs]](../models/chatcompletiontokenlogprobs.md) | :heavy_minus_sign: | Log probabilities for the completion |