LaunchDevelopersSeptember 23, 2026

Claude Opus 5.5 lands in Devin, tops FrontierCode 1.1

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Claude Opus 5.5 is now live in Devin Desktop and Devin CLI, taking the #1 spot on Cognition's FrontierCode 1.1 benchmark ahead of Fable 5 and GPT-6 Astra. It costs less than a tenth of Fable 5 and about a sixth of Astra per task, and reaches fixes roughly 4x faster than Fable 5.

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