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Outlines

Generate perfectly structured text with AI, every single time.

Outlines is an AI agent that enables structured text generation for large language models, providing precise control over output through advanced techniques like JSON, regex, and grammar-based generation.

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Paid
Closed Source
Outlines AI agent

Overview

Outlines is an open-source Python library designed to transform large language models (LLMs) into predictable, structured text generation tools. By providing advanced generation techniques, it allows developers to create more reliable and controlled AI applications.

Key Features

  • Multiple model integrations (OpenAI, transformers, llama.cpp)
  • Fast JSON generation using Pydantic models and JSON schemas
  • Regex and context-free grammar-based generation
  • Dynamic type constraints and multiple choice generation
  • Efficient structured text generation with minimal performance overhead
  • Jinja2-based prompt templating system

Use Cases

  • Generating structured data for machine learning
  • Creating consistent JSON/XML outputs
  • Developing domain-specific language processors
  • Building reliable AI-powered data extraction tools
  • Implementing constrained text generation in conversational AI

Technical Specifications

  • Language: Python
  • Model Support: Transformers, OpenAI, llama.cpp
  • Generation Methods: JSON, Regex, CFG, Type Constraints
  • Templating: Jinja2
  • Licensing: Apache-2.0
  • Compatibility: Python 3.8+