GitHub Launches Copilot Fusion for Automated Model Routing

GitHub has made Copilot Fusion generally available across GitHub Copilot plans, giving developers a system that selects and coordinates AI models for coding tasks. In an independent benchmark, Fusion Max scored 60 on the Artificial Analysis Coding Agent Index, close to Claude Code with Opus 5.5 Max, at about half the API cost per task. GitHub's announcement describes Fusion as a model-routing and orchestration system rather than a standalone model.