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openai/harmony

Official

Renderer for the harmony response format to be used with gpt-oss

4,397 stars286 forksRustUpdated April 2026
✅ Reviewed by My AI Guide

Our Verdict

Rust renderer for the Harmony response format used with gpt-oss. Best for developers building gpt-oss applications needing fast response rendering. Key differentiator: native Rust performance versus JavaScript alternatives.

Frequently Asked Questions

What is openai/harmony used for?

openai/harmony is a renderer for the Harmony response format designed for use with gpt-oss. Written in Rust, it processes and renders responses efficiently in gpt-oss projects.

What is harmony?

Renderer for the harmony response format to be used with gpt-oss

How do I install harmony?

Visit the GitHub repository at https://github.com/openai/harmony for installation instructions.

What license does harmony use?

harmony uses the Apache-2.0 license.

What are alternatives to harmony?

Search My AI Guide for similar tools in this category.

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Open source & community-verified

Apache-2.0 licensed: free to use in any project, no strings attached. 4,397 developers have starred this, meaning the community has reviewed and trusted it.

Reviewed by My AI Guide for relevance, quality, and active maintenance before listing.