Instructor — Free & Open Source for Startups
Structured output library for LLMs — get typed, validated responses from any AI model.
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Deal Highlights
Instructor is an open-source Python library for getting structured, typed outputs from LLMs. Instead of parsing messy AI text responses, Instructor validates LLM output against Pydantic models — guaranteeing you get clean JSON matching your schema every time.
Reliable AI Output
LLMs return unstructured text. Your application needs structured data. Instructor bridges this gap by prompting the LLM for JSON matching a Pydantic model, validating the response, and retrying automatically if validation fails.
Works With Any LLM
OpenAI, Anthropic Claude, Google Gemini, Mistral, Ollama, and any OpenAI-compatible API. One library, any model, guaranteed structured output.
Pricing
Free and open-source.
Who Is This Deal For?
Early-Stage Startups
Seed and pre-seed companies looking to move fast without overspending on tools.
Growing SaaS Teams
Series A+ companies scaling their stack and optimizing software costs.
Solo Founders
Indie hackers and bootstrapped founders who need enterprise tools at startup prices.
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Frequently Asked Questions
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