Pydantic AI

Pydantic AI is a Python agent framework from the Pydantic team that brings type-safe, validated interactions to LLM development. It works with OpenAI, Anthropic, Gemini, DeepSeek, Groq, Mistral, and more. Define tools from normal Python functions with type hints, use dependency injection for customization, and get structured outputs validated by Pydantic. Supports multi-agent patterns, graph-based workflows, MCP, and Agent2Agent interoperability. Includes a built-in evaluation framework (pydantic-evals).