Instructor

Name: Instructor
Rating: 4 (9600 reviews)
Author: Jason Liu

Lightweight

Structured extraction library that patches LLM clients to return Pydantic models. Simple API for reliable structured output with automatic retries and validation.

by Jason Liu9.6k starsMITUpdated Apr 2026

Installation

Install

pip install instructor

Language support

PythonTypeScriptRubyGoElixir

Supported LLMs

OpenAIAnthropicGoogleMistralCohereOllama

Features (8)

structured_output

retries

validation

streaming

partial_responses

multi_modal

hooks

batch

Source

View on GitHub

Details

Author: Jason Liu
Category: Lightweight
Languages: 5
Features: 8
Stars: 9.6k
License: MIT
Status: Community

Related frameworks

PydanticAI by Pydantic
smolagents by Hugging Face
OpenAI Swarm by OpenAI