The Mid-Tier Trap: The Muse Wonder Score in the Headline Is Not the Model on the API

The current Artificial Analysis Intelligence Index shows a tight cluster at the top, with Claude Opus 5.5 (Max) leading at 58, followed by Claude Sonnet 5.5 (Max), Claude Opus 5.5 (Xhigh), and Muse Wonder Full (Max) all sitting at 56. Out of 127 models evaluated, the top four span exactly two points. For enterprise buyers, this headline composite opens a procurement gap. The 56 in the headlines is the subscription-tier model. The API tier enterprise teams can actually call scores 52, at $4 per million input tokens and $20 per million output.

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