GitHub Copilot orchestrates multiple models at runtime with Project HydraFusion

GitHub launches HydraFusion, a research preview that picks between a single model, a cascade, or an independent critique at runtime to deliver frontier-level quality at the lowest cost. On TerminalBench 2.1 it gains 4.9 points at 67% lower estimated cost than Claude Opus 5, available via /experimental in Copilot CLI.