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

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

GitHub has debuted GitHub Copilot Fusion, a new system that handles model selection and orchestration for coding tasks so developers don’t have to. 

Combining the advanced runtime model orchestration from Project HydraFusion with Copilot Auto Model Selection, the fusion means Copilot can now take care of both model selection and orchestration — and GitHub says it can do it faster and cheaper than Claude Code with Opus 5.5 Max.

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,” apparently one where developers are no longer the default decision-makers. 

GitHub announced the news on Wednesday at GitHub Universe in San Francisco, the company’s flagship developer event.

When developers work on reasoning, code generation, debugging, or other tasks, GitHub says they no longer need to make the decisions. Copilot Fusion can do it for them: Just “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. With Copilot Fusion working as the “model picker,” developers don’t have to weigh performance and price for every task.

More compelling is the idea that developers can use Copilot Fusion to strategically switch models mid-workflow, letting the system jump between models based on what best suits each step. 

After analyzing what the task requires and choosing a model, the system orchestrates the next steps based on what makes the most sense.


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