AnalysisAI ModelsOctober 28, 2026

Artificial Analysis Intelligence Index v5 puts Claude Opus 5.5 on top

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v5 is the biggest upgrade since v4 in January, with 60% of the Index now built on private test sets or held-out answers. Claude Opus 5.5 (max) leads at 58, ahead of GPT-6 Astra (max, 57) and GPT-6.1 Sol.

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