Agent frameworks & harnesses · Pydantic
Pydantic AI
A Python framework for typed agents. You name a model, add tools, and get answers checked against a schema. A separate harness package adds files, a shell, and planning for longer jobs.
Last verified:
Features
- A typed agent loop that can swap models by changing a string
- Pydantic AI Harness for memory, guardrails, sub-agents, planning, and a coding agent
- Separate open-source packages for evals and graph control flow
- The GitHub repository is MIT licensed
Pricing summary
The Pydantic AI library has no fee of its own and is MIT licensed. Pydantic's pricing page is for Logfire, the observability product, not the framework. Logfire Personal is free with 10 million records a month. Team is $49 per month. Growth is $249 per month. Extra records on Team and Growth are $2 per million. Enterprise is custom. The page says those prices apply to Logfire.
open-source
Pydantic AI is a framework. Logfire is the paid product on the same company's pricing page, and it is optional.
