Cognition brings Fusion to Devin Desktop and CLI
A frontier lead plans and reviews while a lower-cost sidekick executes delegated work in its own persistent context.
By Aaron Felix · Updated 7 October 2026
What this changes for UK buyers
Teams can test multi-model coding without building a router, but reported savings vary by task and do not prove lower accepted-change cost on their repositories.
What buyers should do
Benchmark representative repository tasks against the current single-agent baseline, including retries, review, tests and recovery.
Primary announcement
Cognition Fusion launch ↗This is a dated source-linked buyer briefing. A vendor announcement does not prove UK account eligibility, an independent performance result or regulatory compliance. Open the primary source and confirm the exact plan before changing a production workflow.
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