Pydantic AI AI Updates: June 30, 2026

1. Pydantic AI Ships v2.1.0 with Anthropic Web Tools and Server-Tool Replay

Pydantic AI. Pydantic AI released v2.1.0, a minor version adding support for Anthropic web tools with server-tool replay and switching instrumentation message serialization to use to_json instead of json.dumps. The release also adds TypeAdapter support for EvaluatorContext and includes bug fixes for MCPToolset error handling, stream cancellation states, and Anthropic Bedrock token counting. The update drew contributions from eight developers, four of them first-time contributors. Source

2. Pydantic AI Releases v2.1.1 Patch with Bug Fixes

Pydantic AI. Pydantic AI published v2.1.1, a patch release focused on documentation enhancements and bug fixes shortly after v2.1.0. The fixes address image detail forwarding for certain model providers, callback execution on Pyodide and emscripten, temporal grouping issues, and audio token tracking in usage metrics. The release continues the rapid iteration on the v2 line that began with the stable v2.0.0 launch the prior week. Source