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Instructor

Structured outputs from LLMs with validation

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What is Instructor?

Instructor is structured outputs from LLMs with validation

About

Instructor makes it easy to get structured, validated outputs from LLMs. Built on top of Pydantic, it provides a simple API for extracting typed data from LLM responses with automatic retries, streaming, and validation.

Strengths

  • Dead simple API
  • Pydantic validation
  • Works with any LLM

Limitations

  • Focused on extraction only
  • Python-centric
  • Limited agent capabilities

Use Cases

Data extractionStructured outputsForm filling

Integrations

OpenAIAnthropicMistralLiteLLM