DeepSeek-V4.1-Flash takes the top open model spot in Code Arena

The Chinese lab's October update edged past Kimi K3 (Max) on the WebDev leaderboard at a fraction of the cost DeepSeek has a new title to its name. Its DeepSeek-V4.1-Flash-20261017 model is now the highest-ranked open model on Arena.ai’s Code Arena WebDev leaderboard. It got there by beating Kimi K3 (Max) while costing roughly a tenth as much to run. Arena.ai posted the update on October 18, 2026. It showed the new DeepSeek build scoring 1670 points on Code Arena WebDev. That score puts it at #1 among open models and #12 overall.

Source: Crypto Briefing