GitHub's HydraFusion cuts cost in all three benchmarks, matches Opus 5 quality in one

GitHub's Project HydraFusion builds a per-request execution strategy — one model, cascade to a stronger one, or independent critique — instead of routing each task to a single model. Against Claude Opus 5 it cut estimated cost in all three benchmarks, up to 67%, but exceeded Opus 5 on quality in only one (+4.9 points on TerminalBench 2.1). It is live on all Copilot plans behind the /experimental flag at standard token rates, first-turn prompts only — a cost lever a developer can enable today, not a quality upgrade.

Source: venturebeat.com ↗