The HydraFusion research preview is now available in Visual Studio Code and the GitHub Copilot app, expanding beyond Copilot CLI.

HydraFusion appears in the model picker, but rather than being a single model, it orchestrates multiple models.

HydraFusion treats workflow selection as an optimization problem.

It uses capability signals for reasoning, code generation, debugging, and tool use to select the most efficient execution pattern to meet the quality bar.

HydraFusion uses one of three workflows: Single: One selected model directly solves the task.

Cascade: An efficient model drafts a solution and a quality gate decides whether to accept it or escalate to a stronger model.

Critique: One model drafts a result, an independent read-only critic from a different model family reviews it—following the same review pattern as Rubber Duck —and the drafting model revises once.

In VS Code (version 1.140 or later, or VS Code Insiders): Select HydraFusion from the Copilot Chat model picker.

If it does not appear, enable chat.copilot.hydraFusion.enabled .

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