Changelog

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:

1
{
2
  "agent": {
3
    "think": {
4
      "provider": {
5
        "type": "anthropic",
6
        "model": "claude-sonnet-5",
7
        "temperature": 0.5
8
      }
9
    }
10
  }
11
}

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 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.