What is Pydantic AI?
Latest launch MIT
Summary
Pydantic AI is a model-agnostic Python framework for building typed AI agents and applications.
- Category
- Frameworks
- Open source
- Yes
- License
- MIT
- Pricing
- Not stated in the sources on this page.
Pydantic AI is described on pydantic.dev as a model-agnostic Python framework for building production-grade AI applications, with type safety, structured outputs, validation and observability. Its repository is pydantic/pydantic-ai and reports an MIT license.
This hub was created with the dated launch Pydantic AI 2.55.0, released October 9, 2026. Browse more tools in the Frameworks category.
Pydantic AI alternatives
| Tool | License | Pricing note |
|---|---|---|
Pydantic AIThis pagePydantic AI is a model-agnostic Python framework for building typed AI agents and applications. | MIT | Not stated |
LangGraphLangGraph is an open-source orchestration runtime for building stateful, resilient agents. | MIT | Not stated |
MastraTypeScript agent framework. Mastra Code is the terminal agent; AgentController is the extracted loop, in @mastra/core 1.47.0 or later. | Open source | Mastra Code and AgentController are announced as open source. No license fee is stated in the posts we cited. |
AgnoAgno is an orchestration and service layer for agents, exposing them through a REST API and an MCP server. | Apache-2.0 | Not stated |
adk-pythonAn open-source, code-first Python toolkit for building, evaluating and deploying AI agents. | Apache-2.0 | Not stated |
Launches and updates
Pydantic AI 2.55.0 adds Conversation and prompt caching
Pydantic AIPydantic AI 2.55.0, released October 9, 2026, requires Python 3.11 and adds Conversation, a unified cache setting and Postgres stores.
Category: Frameworks
Pricing: Open source
Guides covering Pydantic AI
Questions
What is Pydantic AI?
The product site describes it as a model-agnostic Python framework featuring type safety, structured outputs, validation and observability.
Is Pydantic AI open source?
The GitHub repository reports an MIT license.
Which models does it support?
The product site says it supports OpenAI, Anthropic, Google and more.