Pydantic AI

Pydantic AI is a Python agent framework built by the team behind Pydantic, designed to bring the FastAPI developer experience to generative AI. It prioritizes type safety, giving your IDE and AI coding agent maximum context for auto-completion and type checking, moving entire classes of errors from runtime to write-time. Build agents from composable capabilities that bundle tools, hooks, instructions, and model settings into reusable units. Durable execution enables agents to preserve progress across transient API failures, restarts, and long-running human-in-the-loop workflows. It supports virtually every model provider: OpenAI, Anthropic, Gemini, DeepSeek, Grok, Cohere, Mistral, Ollama, Groq, OpenRouter, and Together AI. With 16K+ GitHub stars and weekly releases, it has become a go-to framework for Python developers who want production-grade agent infrastructure.