Outlines constrains model generation so outputs are guaranteed to match a regex, JSON schema or grammar, at the token level, including with local models.
From the README
- Works with any model - Same code runs across OpenAI, Ollama, vLLM, and more
- Simple integration - Just pass your desired output type: model(prompt, outputtype)
- Guaranteed valid structure - No more parsing headaches or broken JSON
- Provider independence - Switch models without changing code
Excerpts from the project README on GitHub. Copyright and licensing remain with the respective authors.
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outlines has 15.7k stars on GitHub. It has been forked 869 times. outlines is written mainly in Python. It has been in active development since 2023. outlines is available under the Apache-2.0 license. Its main topics are cfg, generative-ai, json, llms.
Read the full guideWhat is outlines?
Structured Outputs
Is outlines open source?
outlines is an open-source project. It is released under the Apache-2.0 license.
Is outlines free?
Yes. outlines is free and open source — you can use, modify and self-host it.
What license does outlines use?
outlines is available under the Apache-2.0 license.
What language is outlines written in?
outlines is written mainly in Python.
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