# Update Think

Voice Agent

The `UpdateThink` message is a JSON message that you can use to replace the Think provider in the middle of a conversation.

## Purpose

The `UpdateThink` message is a JSON message that allows you to replace the entire Think provider configuration during a conversation, including the model, prompt, endpoint, and functions. This flexibility enables real-time adjustments to the agent's reasoning capabilities, ensuring a more dynamic and responsive interaction tailored to the evolving needs of the conversation.

Unlike [`UpdatePrompt`](/guides/self-hosted-deployments-3-voice-agent-update-prompt), which adds to the existing prompt, `UpdateThink` replaces the entire Think provider configuration. This means you can switch to a different LLM provider, change the model, set a completely new prompt, and reconfigure functions all in a single message.

## Example Payloads

To send the `UpdateThink` message, you need to send the following JSON message to the server:

**`JSON`**

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

Upon receiving the `UpdateThink` message, the server will process all remaining audio data and return a [`ThinkUpdated`](/guides/self-hosted-deployments-3-voice-agent-acknowledgements#thinkupdated) message.

**`JSON`**

```json JSON
{
    "type": "ThinkUpdated"
}
```

## Related pages

- [Inputs: Client Messages](./self-hosted-deployments-3-voice-agent-inputs.md)
- [Settings](./self-hosted-deployments-3-voice-agent-settings.md)
- [Update Listen](./self-hosted-deployments-3-voice-agent-update-listen.md)
- [Update Speak](./self-hosted-deployments-3-voice-agent-update-speak.md)
- [Update Prompt](./self-hosted-deployments-3-voice-agent-update-prompt.md)
- [Inject Agent](./self-hosted-deployments-3-voice-agent-inject-agent-message.md)
- [Inject User](./self-hosted-deployments-3-voice-agent-inject-user-message.md)
- [Force End Turn](./self-hosted-deployments-3-voice-agent-force-end-turn.md)
- [Agent Keep Alive](./self-hosted-deployments-3-agent-keep-alive.md)

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