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SWE-2's easy slice is near-perfect. Its scorecard hides why

This story is from 2026-09-12. It is preserved in the archive; the latest stories are on the live feed.

Cognition shipped SWE-2 yesterday, and the framing is "pushing the Pareto frontier": within a point of Fable 5.1 on FrontierCode 1.1 Main while being 64% cheaper. That's a real number on an easy benchmark. But the scorecard has a second column that tells a different story, and it's the one nobody i…

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  1. 2026-09-12 00:15 · DEV Community — Machine Learning
    SWE-2's easy slice is near-perfect. Its scorecard hides why

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