Pydantic AI

A model-agnostic Python agent framework from the Pydantic team, built for type-safe agents with validated structured outputs, function tools, dependency injection and graph-based control flow. Reached 1.0 in September 2025.

Website

https://ai.pydantic.dev

Who it's for

Python developers who want validated, structured agent outputs across many model providers with low boilerplate.

Pricing

Framework free and open source (MIT). Companion Pydantic Logfire observability is freemium: free Personal, $49/mo Team, $249/mo Growth, custom Enterprise.

Category

Agent frameworks & orchestration

Last verified

2026-10-22 (current)

Confidence

high

Key facts

• Python
• MIT licence
• Typed structured outputs, tools, dependencies and hooks
• Model-agnostic: OpenAI, Anthropic, Gemini, Bedrock, Cohere, Mistral, Groq
• Includes MCP client/server, Pydantic Graph, Pydantic Evals and durable-execution integrations

Sources

Every claim above is drawn from these; we do not publish unsourced specifications.

• https://ai.pydantic.dev/
• https://pydantic.dev/pricing
• https://github.com/pydantic/pydantic-ai

Notes & uncertainties

The paid pricing on pydantic.dev applies to Logfire and the AI Gateway, not the framework.

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