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Claude Fable 5.1 Tops AI Index, but Cost per Task Rises 20%

AI · Studies · 2026-09-02 04:12:00

Claude Fable 5.1 achieved the highest score in the latest AI performance evaluation, but its cost per task is 20% higher than its predecessor. The article notes that despite significant performance gains, higher costs may deter large-scale enterprise deployment.

Source: artificialanalysis.ai


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