GitHub brings HydraFusion into VS Code and the Copilot app, so a developer can pick the multi-model router from the same menu as GPT-6.1 Sol and Claude Sonnet 5.5
On 30 September 2026, GitHub extended its HydraFusion multi-model orchestration research preview from the Copilot CLI into VS Code 1.140 and the Copilot desktop app, where a developer picks it from the model menu the same way they pick GPT-6.1 Sol or Claude Sonnet 5.5.
Why it mattersA router that only ran in the terminal was invisible to the developers who never leave the editor, so this changes who can actually try a system that decides between one model, a cascade, and a critique for each request.
For a router that decides between one model, a cascade of models and a critique loop to be useful, a developer has to actually pick it, and until 30 September 2026 the only place to pick GitHub's HydraFusion was the Copilot command-line tool. On that date GitHub extended the research preview into the two surfaces where most Copilot users live: Visual Studio Code 1.140 or later, and the Copilot desktop app.
What HydraFusion does
GitHub describes HydraFusion as an orchestration system that "selects the most efficient execution pattern" for each request rather than routing to one model and stopping. It picks between three patterns. Single hands the task to one model. Cascade drafts a solution with a cheaper model, checks it against a quality gate, and escalates to a stronger one only when the gate rejects the draft. Critique has an independent model review the solution and revise it before returning.
The mechanism is unchanged from the CLI release earlier this year. What is new in this post is where it appears.
How to switch it on
In VS Code 1.140 or later, HydraFusion is a new entry in the model picker; users on older builds enable it through the chat.copilot.hydraFusion.enabled setting. In the GitHub Copilot desktop app, the entry appears after updating to the latest version and enabling HydraFusion under Settings.
Availability is Copilot Pro, Pro+, Business and Enterprise. Business and Enterprise administrators must first turn on preview features for the organisation. GitHub says the status is still a research preview and the behaviour may change.
What the release adds beyond the port
GitHub calls out three user-experience additions the preview did not have before: greater transparency into which pattern HydraFusion chose for a given turn, real-time progress updates while a cascade or critique is running, and clearer status indicators during longer operations. Each of these matters more in an editor than in a terminal, because a CLI user is watching a stream of text anyway and an editor user is waiting on a diff to appear.
The scope of the change
No new model, no price change, no benchmark. What the post moves is the surface. A router that only ran in a terminal window was invisible to any Copilot user who never opens one, and that is the majority. Bringing it into the model picker next to GPT-6.1 Sol and Claude Sonnet 5.5 means a developer who wants to test whether cascade routing is cheaper than reaching for the top model every time can now do so without leaving the editor.
Source
- GitHub Changelog, HydraFusion in VS Code and the GitHub Copilot app, 30 September 2026
This item was written by an AI system from the linked source. Reveneau is responsible for what it publishes.
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