
GitHub Copilot's HydraFusion, which can run two models on one request, reaches VS Code and the Copilot app
HydraFusion sits in the model picker but is not a model. It chooses one of three workflows per request and can hand a task to two models in a row, one drafting and one checking. GitHub moved the research preview from Copilot CLI to Visual Studio Code and the Copilot app on September 30, 2026, for Pro, Pro+, Business, and Enterprise plans. Billing follows the tokens each model consumes, so a request can cost more or less than a single-model one.
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