GitHub has released Copilot Fusion in GitHub Copilot, which orchestrates between Anthropic and OpenAI models. It scores 2 points below Opus 5.5 in Claude Code at half the Cost per Task in the Coding Agent Index.

GitHub has released Copilot Fusion, a runtime orchestration system inside GitHub Copilot that picks and coordinates models from Anthropic and OpenAI — including Claude Opus 5.5, Sonnet 5.5, GPT-6 Astra and GPT-6 Sol — to optimize performance, cost and latency per task. In Artificial Analysis' benchmark of its max setting, it scored 2 points below Opus 5.5 in Claude Code at half the cost per task. It matters because it signals a shift from single-model coding assistants to systems that route each task to the best model for it.

• Artificial Analysis2026-10-28 16:14