GitHub HydraFusion: Copilot Now Routes Workflows, Not Models

GitHub shipped a research preview called HydraFusion into Copilot CLI on September 4, and it deserves more attention than the cost-reduction headline. Yes, GitHub claims up to 67% lower estimated cost versus Claude Opus 5 in one benchmark. But the real shift is architectural: Copilot now orchestrates multiple AI models within a single coding task, dynamically selecting from three execution strategies. This is not a model upgrade. It is Copilot becoming a workflow engine. Three Patterns, One Routing Decision HydraFusion’s core mechanic is choosing — at runtime, per task — which of three execution patterns to apply: Single: One model […]

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