Pydantic AI Updates: July 4, 2026

1. Pydantic AI Ships v2.5.0 With Message Sanitization and Multimodal Tool Returns

Pydantic AI released v2.5.0, adding sanitize_messages for inbound message-history hardening against injected or malformed content, and support for round-tripping multimodal tool returns through the AG-UI and Vercel AI adapters. The release also fixes MoonshotAI Kimi thinking support and corrects Bedrock media type handling for Meta, Mistral, and Qwen models. Source