# July 1, 2026

## Claude Sonnet 5 Now Available

`claude-sonnet-5` is now available as a managed Anthropic LLM in the Voice Agent API. This Advanced tier model delivers improved reasoning and conversational quality for your voice agents.

Set the model in your agent configuration:

```json
{
  "agent": {
    "think": {
      "provider": {
        "type": "anthropic",
        "model": "claude-sonnet-5",
        "temperature": 0.5
      }
    }
  }
}
```

### Deprecation: Claude Sonnet 4

`claude-sonnet-4-20250514` is now deprecated. Migrate to `claude-sonnet-5` or another supported Anthropic model. This model has been [retired by Anthropic](https://platform.claude.com/docs/en/about-claude/model-deprecations#2026-04-14-claude-sonnet-4-and-claude-opus-4-models) and will produce an error if specified in your settings configuration.

For the full list of supported models and pricing tiers, see the [Voice Agent LLM Models documentation](/guides/self-hosted-deployments-3-voice-agent-llm-models).

## 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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