Changelog

Multiple LLM Provider Support

We’ve added new functionality that allows users to specify multiple LLM providers for your Voice Agent, ensuring your agent will automatically fallback to another provider should you experience any issues. The think object supports both a single provider and an array of providers. LLM providers will be used in the order that you specify them.

For more details, visit our Voice Agent Multiple LLM Models documentation

🤖 New LLM Models Support

We’ve added support for new LLM models in our Voice Agent API!

Available Models:

• OpenAI GPT 5.1 Chat (gpt-5.1-chat-latest)
• OpenAI GPT 5.1 (gpt-5.1)
• Anthropic Claude Sonnet 4.5 (claude-sonnet-4-5
• Google Gemini 3 (gemini-3-pro-preview)

Implementation: Configure your chosen model in your Voice Agent settings:

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{
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  "type": "Settings",
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  "agent": {
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    "think": {
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      "provider": {
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        "type": "open_ai",
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        "model": "gpt-5.1"
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      }
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    }
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  }
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}

For complete information about supported LLMs including the new models, visit our Voice Agent LLM Models documentation.