pydantic/pydantic-ai v1.59.0

v1.59.0 (2026-02-13)

on GitHub

What's Changed

🚀 Features

• Add Model.model_id property that returns provider:model by @tdevelope in #3917
• Add opt-in flag for aggregated usage attribute names by @thiagohora in #4277
• Enhance Contains evaluator to support pydantic.BaseModel by @tomsquest in #4003
• Vercel AI adapter: let BaseChunks be injected through ToolReturnPart.metadata by @0xyjk in #4230

🐛 Bug Fixes

• XAI: lazily create AsyncClient per event loop to avoid gRPC loop mismatch by @DouweM in #4316

New Contributors

• @tdevelope made their first contribution in #3917
• @thiagohora made their first contribution in #4277
• @0xyjk made their first contribution in #4230

Full Changelog: v1.58.0...v1.59.0