Instructor
Structured outputs from LLMs
Instructor patches LLM clients to return validated, typed outputs using Pydantic models. Works with OpenAI, Anthropic, and other providers. Simple API for structured extraction.
Panel Reviews
The Builder
Developer Perspective
“The simplest way to get typed, validated outputs from LLMs. Pydantic integration is natural for Python developers.”
The Skeptic
Reality Check
“Does one thing perfectly. No over-abstraction, just structured outputs. The anti-LangChain.”
The Futurist
Big Picture
“Structured outputs are the bridge between LLMs and traditional software. Instructor makes that bridge trivial to build.”
Community Sentiment
“Instructor with Pydantic is the cleanest way to get structured JSON from any LLM — no prompt hacks needed”
“Switched from manual JSON parsing to Instructor and halved my LLM extraction bug rate overnight”
“Instructor's retry-on-validation-error feature is subtle but solves 90% of LLM structured output failures”
“If you're extracting structured data from LLMs and not using Instructor, you're making life hard for yourself”