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Pydantic AI

Pydantic · Type-Safe Python Agent Framework

Open Pydantic AI

A Python agent framework with built-in validation and structured outputs, built by the team behind Pydantic.

PricingFree

Setupmedium

Runs onSelf-hosted

APINo

Open sourceYes

DocsYes

CategoryAgent Frameworks

Agent FrameworkPythonType SafetyOpen SourceValidationStructured Output

Best for

Type-safe Python agents with validated structured outputs

Not ideal for

Non-Python developers or teams needing a visual agent builder

Who it's for

Python developers building production agent systems who value type safety and structured validation

Capabilities

Type-safe agent outputs validated by Pydantic schemas
Model-agnostic — supports OpenAI, Anthropic, Google, and more
Dependency injection for clean testing and composition
Pydantic Logfire integration for observability
Structured output validation with automatic retries

Limitations

Python only — no support for other languages
No visual builder or GUI — code-only
Requires familiarity with Pydantic typing patterns
No hosted runtime — you manage your own infrastructure

Use cases

Building agents that return validated structured data
Production AI pipelines requiring type safety and error handling
Multi-step agent workflows with dependency injection
Integrating LLM outputs into typed Python applications
Agent systems requiring observability and monitoring

Integrations & fit

OpenAIAnthropicGooglePydantic LogfirePython

Good fit forStartup / small team, Enterprise

Pricing modelFree· No cost to start

See pricing on Pydantic AI →

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About Pydantic AI

Pydantic AI is a Python agent framework designed for building production-grade generative AI applications with type safety and structured outputs. Built by the Pydantic team — whose validation library is used by the OpenAI, Anthropic, and Google SDKs — it brings the same approach to agent development: define expected output schemas, and the framework validates agent responses automatically. It supports multiple LLM providers, dependency injection for testing, and integrates with Pydantic Logfire for observability. Pydantic AI is MIT-licensed, self-hosted, and designed for developers who want strong typing guarantees and clean error handling in their agent pipelines.

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