# Outlines — Guaranteed Structured LLM Outputs

> Outlines guarantees valid structured outputs from any LLM. 13.6K+ GitHub stars. JSON, Pydantic, enums, regex constraints during generation.

## Install

Save as a script file and run:

## Quick Use

```bash
pip install outlines
```

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## Intro

Outlines is a Python library that guarantees valid structured outputs from large language models during generation. With 13,600+ GitHub stars, it works with any LLM (OpenAI, Ollama, vLLM) through a simple model(prompt, output_type) interface. Supports Pydantic models, enums, literals, unions, regex patterns, and JSON schemas.

**Best for**: Developers needing reliable structured data extraction from LLMs
**Works with**: Claude Code, OpenAI Codex, Cursor, Gemini CLI, Windsurf

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## Key Features

- Guaranteed valid output during generation
- Any LLM: OpenAI, Ollama, vLLM, Transformers
- Pydantic models and regex constraints
- Batch processing
- Simple API: model(prompt, output_type)

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### FAQ

**Q: What is Outlines?**
A: Outlines guarantees valid structured outputs from any LLM with 13.6K+ stars. JSON, Pydantic, regex constraints during generation.

**Q: How do I install Outlines?**
A: pip install outlines.

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## Source & Thanks

> Created by .txt. Open source.
> [dottxt-ai/outlines](https://github.com/dottxt-ai/outlines) — 13,600+ GitHub stars

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Source: https://tokrepo.com/en/workflows/c62993b1-664e-4c0e-a746-841fd9143370
Author: Script Depot