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20 of 21 agent configs just scored lower: what the Coding Agent Index v2.0 reset measures

This story is from 2026-10-24. It is preserved in the archive; the latest stories are on the live feed.

Yesterday Artificial Analysis shipped version 2.0 of its Coding Agent Index , and almost every agent on the board got worse on paper. Of the 21 configurations measured on both versions, 20 moved down. The mean index score fell from 54.8 to 47.4. No model regressed and no harness regressed. The test…

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  1. 2026-10-24 14:17 · DEV Community — AI
    20 of 21 agent configs just scored lower: what the Coding Agent Index v2.0 reset measures

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