Daily News · 1 min read

Pydantic AI Updates: August 13, 2026

pydantic-ai agents mcp voice

1. Pydantic AI v2.29.0 Adds FastMCP 4 Support and Azure AI Voice Live

Pydantic AI. Pydantic AI v2.29.0 extends MCPToolset to support FastMCP 4 and MCP SDK v2 alongside FastMCP 3, keeping backward compatibility while enabling the newer protocol versions. The release also adds Azure AI Voice Live through a new azure_voice_live setting, broadening the framework’s realtime voice options. Bug fixes address silent truncation of gzip responses, missing parameter descriptions in rendered tool signatures, WebRTC and Azure realtime issues carried over from earlier releases, and a concurrent provider stream shutdown problem. Source