# February 25, 2026

## UpdateThink: Replace Think Provider Mid-Conversation

You can now dynamically replace the entire Think provider configuration during a live Voice Agent conversation using the new `UpdateThink` client message. This allows you to switch to a different LLM provider, change the model, set a completely new prompt, and reconfigure functions — all in a single message.

Unlike `UpdatePrompt`, which adds to the existing prompt, `UpdateThink` replaces the full Think provider configuration, giving you complete control over the agent's reasoning setup mid-conversation.

**Example:**

```json
{
    "type": "UpdateThink",
    "think": {
        "provider": {
            "type": "open_ai",
            "model": "gpt-4o-mini"
        },
        "prompt": "You are a helpful voice assistant."
    }
}
```

The server confirms the change with a `ThinkUpdated` response message.

For more details, visit the [UpdateThink documentation](/guides/self-hosted-deployments-3-voice-agent-update-think).

## Related pages

- [Amazon SageMaker](./amazon-sagemaker-index.md)
- [Aura](./aura-index.md)
- [Changelog](../changelog.md)
- [Custom Vocabulary](./custom-vocabulary-index.md)
- [Deepgram's Docs](../index.md)
- [Deployment](./deployment-index.md)
- [Docker/Podman](./docker-podman-index.md)
- [Features](./features-index.md)
- [Flux TTS](./flux-tts-index.md)
- [Formatting](./formatting-index.md)

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