Project screenshots
Overview
Pydantic AI brings the developer experience popularized by FastAPI to GenAI agent development. Built by the Pydantic team, it leverages Pydantic Validation at its core to provide fully type-safe agents, structured output validation, and dependency injection. The framework is model-agnostic, supporting a wide array of LLM providers and allowing custom model implementations. It also features seamless observability integration with Pydantic Logfire, powerful evaluation tools, and extensible composable capabilities.
Key features
- Built by the Pydantic Team leveraging Pydantic Validation
- Model-agnostic support for numerous LLM providers and custom models
- Fully type-safe design moving errors from runtime to write-time
- Seamless observability integration with Pydantic Logfire and OpenTelemetry
- Powerful evals for systematic testing and performance monitoring
- Extensible by design using composable capabilities (e.g., web search, thinking, MCP)
- Model Context Protocol (MCP) integration for external tools and data
- UI event stream standards for interactive streaming applications
- Human-in-the-loop tool approval
- Durable execution for long-running and asynchronous workflows
- Streamed structured outputs with immediate validation
- Graph support for complex control flows
- Dependency injection for type-safe behavior customization
Requirements, installation and quick start
Usage
Model compatibility and use cases
Model-agnostic. Supports OpenAI, Anthropic, Gemini, DeepSeek, Grok, Cohere, Mistral, Perplexity, Azure AI Foundry, Amazon Bedrock, Google Cloud, Ollama, LiteLLM, Groq, OpenRouter, Together AI, Fireworks AI, Cerebras, Hugging Face, GitHub, Heroku, Vercel, Nebius, OVHcloud, Alibaba Cloud, SambaNova, Snowflake Cortex, and Z.AI. Custom models can be implemented.
License and risk notes
MIT License.
Editorial verification 2026-08-09: repository URL, owner, description, license and repository statistics were reviewed. License metadata: MIT. README was fetched for the channel draft; re-check repository dependencies, releases and model terms before production use.
Release and maintenance
Not stated in the repository metadata.