Pydantic
Open sourceObservability and type-safe tooling for teams building Python AI apps
Launched 1 week agopydantic.dev
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About Pydantic
Pydantic, the team behind the widely used Python validation library, offers a stack for building AI applications. Logfire handles observability, with structured logging, tracing and metrics that understand Pydantic models, FastAPI and AI framework data. It auto-instruments LLM providers such as OpenAI and Anthropic, plus LangChain, and is built on OpenTelemetry. Pydantic Evals covers evaluation, Pydantic AI builds typed agents, and AI Gateway tracks LLM costs. The libraries are open source; the hosted service is paid, with a free tier.