DeepSeek-V4.1-Flash-20261017 has taken the top open-model spot on Arena AI’s Code Arena WebDev leaderboard, scoring 1,670 points and ranking 12th overall. The model overtakes Kimi K3 (Max) while costing roughly one-tenth as much to run, strengthening DeepSeek’s position in cost-efficient AI coding.
DeepSeek-V4.1- Flash-1017 Tops Arena AI’s Code Arena WebDev Leaderboard, Beats Kimi K3 at Lower Cost