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DeepSeek-V4.1-Flash-20261017 becomes top open model in Code Arena WebDev

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Arena says DeepSeek-V4.1-Flash-20261017 (Max) is now the #1 open model in Code Arena WebDev, ahead of Kimi K3 (Max). It ranks #12 overall with 1670 points, 52 points above the previous DeepSeek-V4.1-Flash-20260910, and is priced at $0.3 per million input tokens and $1.2 per million output tokens.

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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 $0.3/$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!

DeepSeek@deepseek_ai
🚀 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
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Source: Arena.ai · x.comPublished · added here

Topics

DeepSeekOpen-source ecosystemChina AIEvals & benchmarks