Structured Output & Typing

For when you need the model to return data, not prose. These libraries enforce a schema and hand you validated, typed objects — so an LLM call slots straight into typed code.

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567 Labs

Structured, validated outputs from any LLM — define a Pydantic model and get a typed object back.

v1.15.42026-06-28PythonMIT
#structured-output #pydantic #validation #python
13.6k Completely free Open source
Pydantic AI

Pydantic AI

Pydantic

Type-safe agent framework from the Pydantic team — structured, validated results with any model

v2.16.02026-07-23PythonMIT
#agents #structured-output #pydantic #python
18.8k Completely free Open source