DeepSeek V4.1 Flash Tops Open Code Arena at 1/10th Cost
DeepSeek-V4.1-Flash (Max) has overtaken Kimi K3 to become the #1 open model in Code Arena: WebDev at one-tenth the cost. The update gains 52 points over its predecessor and shifts the Pareto frontier with pricing of $0.3/$1.2 per million tokens, ranking within ~10 points of GPT-6 Sol.
Full Report
Arena.ai (@arena) · 2026-10-18 18
Exciting news: DeepSeek-V4.1-Flash-20261017 (Max) by @deepseek_ai is now the #1 open model in Code Arena: WebDev, surpassing Kimi K3 (Max) at 10x lower cost!
Highlights:
- #1 open model, ahead of Kimi K3 (Max)
- #12 overall with 1670 pts, ahead of Claude Opus 5 (High) and within ~10 pts of GPT-6 Sol (Max)
- Shifts the Pareto frontier at 1.2 per million input/output tokens
- +52 pts vs. the previous DeepSeek-V4.1-Flash-20260910
Congrats to the @deepseek_ai team on another strong contribution to the open source ecosystem!
↳ 引用 @deepseek_ai (DeepSeek): 🚀 DeepSeek-V4.1-Flash-1017 is here!
Stronger benchmark performance, faster task completion, and shorter outputs than the previous version—a Pareto improvement in performance and cost. Now live on our website, app, and API.
🛠️ Optimized for @DeepSeekHarness, Tencent CodeBuddy, WorkBuddy, and more. Upgrade to DeepSeek Harness v0.2.1-rc.1 or later for the best experience with the new model.
1/4
