Structured Output Open Source Projects
Discover 3 open source Structured Output repositories from GitHub, each with an analysis of what it does, key features, use cases and alternatives. Structured Output projects here are most often combined with Library, Python and AI. Last updated October 23, 2026.

simpleaichat: Build Chat Apps with OpenAI ChatGPT
simpleaichat is a Python package for building chat apps with OpenAI ChatGPT and GPT-4 using a small, direct API. It supports streaming, async chats, structured data, and tool calls without requiring a larger framework.
InactiveHealth 23/100

jsonformer: Generate Schema-Shaped JSON with Language Models
Jsonformer guides Hugging Face language models to produce JSON matching a supported schema by supplying predictable structural tokens itself. It may suit Python projects needing structured output, but the repository has been inactive for over a year.
InactiveHealth 23/100

instructor: Get Structured LLM Outputs with Pydantic
Instructor is a Python library built on Pydantic that turns LLM responses into validated, typed data. It provides a consistent schema-first interface across major model providers, with retries and streaming for extraction workflows.
ActiveHealth 68/100