GitHub debuts Copilot Fusion, a new model selection & orchestration system that beats Claude Code for half the API cost

Combining the advanced runtime model orchestration from Project HydraFusion with Copilot Auto Model Selection, Copilot Fusion can now handle both model selection and orchestration. GitHub says Fusion Max delivered comparable benchmark performance to Claude Code with Opus 5.5 Max at about half the average API cost and in about 40% less time per task. Generally available now, GitHub Copilot Fusion is part of GitHub's new vision to make GitHub "the most comprehensive software delivery system in the world," with developers delegating model choices while retaining responsibility for the direction and outcome of the work.

GitHub announced the news on Wednesday at GitHub Universe in San Francisco, the company's flagship developer event. (Credit: The New Stack) GitHub Copilot Fusion is the decider now For tasks involving reasoning, code generation, debugging, or tool use, GitHub says developers can delegate decisions about which models to use and how they work together. Its instructions: "choose Copilot Fusion and let Copilot intelligently route and orchestrate which models it uses for you." That sounds like a time-saver, since different tasks benefit from different models based on capabilities and cost.