Route and orchestrate models with GitHub Copilot Fusion

GitHub Copilot Fusion Release

GitHub has made Copilot Fusion generally available, allowing users to intelligently route and orchestrate models for tasks without manually selecting a specific model. According to GitHub, "GitHub Copilot Fusion is generally available. Instead of picking a model for each task, choose Copilot Fusion and let Copilot intelligently route and orchestrate which models it uses for you."

Copilot Fusion combines Project HydraFusion's multi-model orchestration and Copilot auto model selection's fine-tuned model selection to balance performance and cost efficiency. As stated, "Copilot Fusion brings together Project HydraFusion's multi-model orchestration and Copilot auto model selection's fine-tuned model selection, leveraging the benefits of both to balance performance and cost efficiency."

Usage and Configuration

To use Copilot Fusion, users select it in the model picker and choose an effort level. The effort levels include Fusion Standard, Fusion High, and Fusion Max, which prioritize different types of models for various tasks. According to GitHub, "To use it, select Copilot Fusion in the model picker, then choose the effort level."

Administrators have control over which models Copilot Fusion can use and can set Copilot Fusion as the default model for Copilot users with Enterprise managed settings. As stated, "Administrators control which models Copilot Fusion can use and whether Copilot Fusion is the default."

Performance and Cost

In the Artificial Analysis Coding Agent Index, Copilot Fusion Max scored 60, within two points of Claude Code with Opus 5.5 Max, at about half the average API cost per task. GitHub mentions that "Since Project HydraFusion launched, we've improved its performance. In the Artificial Analysis Coding Agent Index, Copilot Fusion Max scored 60, within two points of Claude Code with Opus 5.5 Max."

When using Copilot Fusion, users are billed for each model it uses at the standard rate, with a 30% discount for paid Copilot plan users for a limited time. According to GitHub, "When you use Copilot Fusion you're billed for each model it uses, at each model's standard rate. For a limited time, users on paid Copilot plans will receive a 30% discount on model costs when using Copilot Fusion."

ToolScout analysis: Intelligent Model Routing

ToolScout analysis suggests that Copilot Fusion's intelligent model routing and orchestration can bring significant benefits to developers, including improved performance and cost efficiency. By automating model selection, Copilot Fusion eliminates the need for manual model switching and optimizes model usage. However, the actual performance and cost benefits will depend on various factors, including the specific use cases and tasks.

Availability and Support

Copilot Fusion is available on all Copilot plans in Visual Studio Code, the GitHub Copilot app, GitHub Copilot CLI, and JetBrains IDEs, with support for additional clients coming soon. According to GitHub, "Copilot Fusion is available on all Copilot plans in Visual Studio Code, the GitHub Copilot app, GitHub Copilot CLI, and JetBrains IDEs. Support for additional clients is coming soon."