Muse Wonder Full Lands Just Behind Opus 5.5

Launch day scores are marketing. Independent index scores are at least an attempt at measurement. Meta Superintelligence Labs launched Muse Wonder and Muse Wonder Full on October 12, 2026, and the first outside scoreboard, the Artificial Analysis Intelligence Index as reported by VentureBeat, puts the flagship near the front of the pack, but not at the front.

The scoreboard

Model	Artificial Analysis Intelligence Index
Claude Opus 5.5	58
Muse Wonder Full	56
GPT 6 Astra	53
Claude Fable 5.1	53
Muse Wonder	52

Two points behind Claude Opus 5.5 is a strong first showing for a new line. It is also, precisely, second place. Both halves of that sentence matter, because launch coverage tends to keep only one of them.

The catch in the fine print

The model with the 56 is not the model you can use. At launch, only the weaker Muse Wonder, the one scoring 52, is available via API. The flagship's number is therefore a claim about a product that exists, performs, and is not yet in customers' hands. That does not make the score fake; independent testing is independent testing. It makes the score a preview, and previews deserve a different weight than shipping products.

A benchmark tells you what a model did in a test harness. It says nothing about what it will do in your workflow, at your price, today.

The honest summary: Meta has a frontier class model on paper and a mid pack model in the API. When Full ships to developers, the comparison gets real. Until then, the scoreboard is a promissory note with good numbers on it.