Claude Opus 5.5 achieves 58 on Artificial Analysis Intelligence Index
September 22, 2026
Claude Opus 5.5 scores 58 on the Intelligence Index, significantly exceeding the median score of 25. The model features a 1M token context window and supports multimodal text and image inputs, though it ranks 87th in cost efficiency.
HOW THIS AFFECTS YOU
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builderYou can leverage high-reasoning capabilities for complex tasks with a large context window.
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researcherThe high intelligence-to-cost ratio provides a new benchmark for evaluating frontier reasoning models.