Claude Opus-5 (Max)

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1. Oct 23
   Kimi K3.1 Pro Ranks Eighth in WebDev Arena

   Arena.ai reported that Kimi K3.1 Pro ranked eighth in the Code Arena: WebDev with 1,692 points, nine places and 37 points above Kimi K3. It also said the model matched Claude Opus-5 (Max) at 70% lower cost. In Agent Arena, Kimi K3.1 Pro (Max) placed 11th after a reported 7.6% net improvement across more than 4,000 sessions, with a six-percentage-point gain over Kimi K3 (Max).

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