# DeepSeek's V4.1-Flash update tops Arena's open agent rankings at $0.20 per task

> Source: <https://runtimewire.com/article/deepseek-v41-flash-arena-agent-rankings>
> Published: 2026-10-19 19:41:57+00:00

# DeepSeek's V4.1-Flash update tops Arena's open agent rankings at $0.20 per task

**Arena's October 19th snapshot ranked the October 17th model update No. 11 overall, based on 7,498 agent sessions.**

        By [Ryan Merket](https://runtimewire.com/author/ryan-merket)
        · Published 

Primary source: [X](https://x.com/arena/status/2112247114944360666)

## Why it matters

Arena's result puts a concrete task-cost figure beside an open-weight model's agent performance, giving developers a reason to test whether DeepSeek's efficiency gains hold in their own workflows.

DeepSeek's October 17th update to V4.1-Flash ranked No. 1 among open models and No. 11 overall on Arena.ai's Agent Arena leaderboard, with a reported median cost of $0.20 per task. Arena shared the result in a [post on X](https://x.com/arena/status/2112247114944360666), citing 7,498 sessions and a 5.13% net-improvement score.…

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