DeepSeek-V4.1-Flash-20261017 (Max) Tops Arena Open Model Leaderboard

Arena announced that DeepSeek-V4.1-Flash-20261017 (Max) has entered Arena and ranks first among open models on both the Agent Arena and Code Arena: WebDev leaderboards. The news was released by Arena on October 21, 2026, and is the latest verifiable development to date. Arena also noted that the 3D world generated by the model and more detailed ranking information can be viewed in the related post. Apart from this top-ranking result, there are no other subsequent developments with qualified factual evidence.

AI-generated from public reports

1. Report date Oct 21· 1 reports

   DeepSeek-V4.1-Flash-20261017 (Max) Tops the Arena Open Model Leaderboard

   Source:Arena