HydraFusion research preview extends to VS Code and the Copilot app

GitHub says its HydraFusion research preview is now available in Visual Studio Code and the GitHub Copilot app, having previously been limited to Copilot CLI. The announcement was published on 30 September 2026 in the GitHub Changelog.

HydraFusion appears in the model picker but, according to GitHub, is not a single model: it orchestrates several. GitHub describes it as treating workflow selection as an optimization problem, using signals about reasoning, code generation, debugging and tool use to pick the most efficient pattern that meets a quality bar. It uses one of three workflows. In "Single", one selected model solves the task. In "Cascade", an efficient model drafts a solution and a quality gate decides whether to accept it or escalate to a stronger model. In "Critique", one model drafts, an independent read-only critic from a different model family reviews the result, and the drafting model revises once.

What is new is availability and visibility. GitHub says bringing HydraFusion to more surfaces was the top request in early feedback, and that the release adds clearer views of each workflow step and more frequent progress updates, including during long tasks.

Access has conditions. In VS Code, users need version 1.140 or later, or VS Code Insiders, and may need to enable the setting chat.copilot.hydraFusion.enabled if HydraFusion does not appear. In the Copilot app, users update to the latest version and turn the feature on in Settings. GitHub says it is available to Copilot Pro, Pro+, Business and Enterprise users, and that Business and Enterprise administrators must enable preview features.

GitHub also distinguishes HydraFusion from Auto: Auto selects a model for each request, while HydraFusion explores selecting a workflow and coordinating multiple models within a single turn.

What is confirmed and what is not: everything above comes from GitHub's own changelog. We found no independent report of this specific expansion, and the behavior of the workflows is GitHub's characterization, which we have not tested. GitHub states the feature remains a research preview and is subject to change.

For developers, the practical significance is that multi-model routing, previously a CLI experiment, can now be tried inside the editor and app where many Copilot users already work. Teams on managed plans should check whether an administrator has enabled preview features before expecting it to appear.

Revised 16 October 2026: Guth re-read the original sources and rewrote this article. The earlier version remains available as revision 1.