Muse Wonder #2 in Text, Muse Spark Open & MiMo V2.6 Pro Tops Open Models

Meta’s Muse Wonder debuts at #2 in Text Arena, while new model arrivals, smarter routing, and research track a fast-moving frontier. Follow Arena on X: https://x.com/arena NEWS: October 9–16, 2026 👉 Muse Wonder (Max): Text Arena #2 / 1513 points, Code Arena: WebDev #15 / 1651 points, and Agent Arena #12 / +6.4% net improvement in its October 13–14 announcement snapshots. 👉 Muse Spark Open: available in Agent Arena; scores coming soon at the October 15 cutoff. 👉 Max router: frontier performance at 37% lower median cost per task than Claude Fable 5.1 (Max) during Arena’s reported test period. 👉 MiMo V2.6 Pro: #1 among open models in Agent Arena, with +3.8% net improvement after the Bash Reliability update. 👉 Gemini-4 Argon (High): #5 overall in Agent Arena, with +13.2% net improvement in the October 13 snapshot. 👉 Confirmed Success: Arena reports the top five agents reached 94% of tasks confirmed done by users, up from 80% in July. 👉 July’s best is now average: the top-20 average matched Claude Fable 5’s July 1 Confirmed Success baseline in 12 weeks. #arenaai #ainews