Gemini 4 Argon lands at No.5 on Agent Arena, Claude Opus 5.5 tops the board
testingcatalog · x · 2026-10-14
Arena updated its Agent Arena overall leaderboard: Claude Opus 5.5 (Max) leads with +16.8% net improvement, followed by GPT-6.1 Sol (Max) at +15.3%. Newly ranked Gemini-4 Argon (High) debuts at No.5 with +13.2%, behind Claude Fable 5.1 and GPT-6 Astra (both +13.6%).
The top 20 also includes Claude Sonnet 5.5 (No.6), GLM-5.2 (No.15), Xiaomi MiMo V2.6 Pro (No.18), and Grok-4.7 xHigh (No.20).
Related event: Agent Arena Update: Claude Opus 5.5 Tops Ranking as Bash Reliability Debuts(6 posts)→
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