Voice Agent API
New Features
🤖 Expanded LLM Support
We’ve significantly expanded our LLM options across our two pricing tiers. The following LLMs are now available for use:
Standard Models
- OpenAI GPT-4.1 mini
- OpenAI GPT-4.1 nano
- OpenAI GPT-4o mini
- Anthropic Claude Haiku 3.5
Advanced Models
- OpenAI GPT-4.1
- OpenAI GPT-4o
- Anthropic Claude Sonnet 4
For complete information about supported LLMs, visit our Voice Agent LLM Models documentation or try them out in our API Playground.
🌍 Spanish Language Support
Voice Agents now support Spanish conversations with the addition of Aura-2 Spanish TTS. Configure your agent’s language settings to enable Spanish voice interactions.
See our Voice Agent API documentation for implementation details.
💬 Conversation Context Feature
Introducing comprehensive conversation continuity with our new context feature:
Complete Context Awareness
- Agents maintain conversation history across sessions
- Seamless continuation of previous interactions
Enhanced User Experience
- More natural conversations with historical context
- Consistent interaction patterns across sessions
Flexible Implementation
- Support for both conversational and function call history
- Configurable history settings
Implementation
Use the agent.context
object to provide conversation history when starting new sessions:
Conversational Messages:
Function Call Messages:
To disable function call history, set settings.flags.history
to false
in the Settings message.
Documentation
🔍 Enhanced Error Visibility
We’ve improved client-side visibility of LLM and TTS errors to provide better debugging and user experience.