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GitHub Introduces Project HydraFusion: Runtime Multi-Model Orchestration That Builds a Workflow Per Coding Task in Copilot CLI

Project HydraFusion is a research preview from GitHub that reframes model selection as an optimization problem. Instead of picking one model, it dynamically chooses a workflow for each request — drafting, critiquing, or escalating across models from multiple providers. Currently available in GitHub Copilot CLI only, it bills per token at each model's standard rate.

SourceMarkTechPostAuthor: Asif Razzaq
GitHub Introduces Project HydraFusion: Runtime Multi-Model Orchestration That Builds a Workflow Per Coding Task in Copilot CLI
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Under the source content permission, this page provides an editorial summary, key points, and a link to the original article.

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Key points

  • HydraFusion selects a workflow, not just a model, for each request, potentially mixing models from multiple providers.
  • Three shipping patterns: Single, Cascade with a quality gate, and Critique with a read-only cross-family reviewer.
  • On TerminalBench 2.1 it beats Opus 5 by +4.9 quality points at 67% lower estimated cost; on DeepSWE and CheckpointBench it trails slightly while cutting costs 36% and 65%.
  • Available now as a research preview through /experimental in Copilot CLI, billed at standard rates of the models invoked.

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