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Pydantic AI Updates: April 10, 2026

pydantic-ai agents open-source

1. Pydantic AI v1.79.0 Adds Full AG-UI Protocol Support with Reasoning and Multimodal

Pydantic AI. Pydantic AI v1.79.0 introduces full support for the AG-UI protocol (versions 0.1.13 and 0.1.15) with reasoning and multimodal capabilities, replaces the HTTP client cache with a new create_async_http_client context manager, and adds the apply() method to capability classes. The update also includes fixes for schema handling, streaming behavior, and error messages. Source