Pydantic AI Updates: August 25, 2026

1. Pydantic AI v2.34.0 Adds a LangChain Migration Skill and GLM-5.3 Support

Pydantic AI. Pydantic AI released v2.34.0, which introduces a LangChain migration skill to help move projects onto the framework and adds GLM-5.3 model support through ZaiModel. The release also fixes enum rendering as Literal in function signatures, UIEventStream state handling on cancellation, dropped zero-argument tool calls in the Cohere model, and Groq credential handling in VercelProvider. Source