Key Info

DeepSeek has released DeepSeek-V4.1-Flash-1017, which delivers stronger benchmark performance, faster task completion and shorter outputs than the previous version, described as a Pareto improvement in performance and cost. It is now live on the website, app and API, and users should upgrade DeepSeek Harness to 0.2.1-rc.1 or above to fully use the new model.

Highlights

  • New model: DeepSeek-V4.1-Flash-1017, now available on website, app and API.
  • Claimed Pareto improvement in performance and cost versus the previous version.
  • Faster task completion and shorter outputs.
  • Optimized for DeepSeek Harness, Tencent CodeBuddy, WorkBuddy and more.
  • DeepSeek Harness 0.2.1-rc.1 or above is required to fully leverage the model.