Claude Opus 5.5 debuts #1 on Text Arena as Anthropic sweeps top six
arena · x · 2026-09-27
Claude Opus 5.5 (High) debuts at #1 on Text Arena with 1509 points, an 18-point jump over Opus 5 (High), which falls to #11. Opus 4.6 (High) sits #2 just 4 points back, giving Anthropic all six top spots. The model also lands on the Pareto frontier at a blended $16/MToken, with Meta's muse-spark and Google's gemini-3.8-flash-high close behind.
Related event: Claude Opus 5.5 Tops Text Arena as Anthropic Sweeps Top Six(3 posts)→
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