DeepSeek releases DeepSeek-V4.1-Flash-1017, with open weights

DeepSeekNew modelConfirmed

DeepSeek says V4.1-Flash-1017 has stronger benchmark performance, faster task completion and shorter outputs than the previous version.

It is live on DeepSeek's website, app and API, and the weights are published on Hugging Face and ModelScope.
The post does not give benchmark numbers or API pricing for this model.

Who can use it: Live on DeepSeek's website, app and API. Regional or account restrictions are not specified by the source. DeepSeek recommends upgrading to DeepSeek Harness v0.2.1-rc.1 or later for the best experience.
When: Announced October 17, 2026 and live at announcement.

DeepSeek official announcement Announced 2026-10-17 · date only

Read the official announcement for access details. Availability can depend on your plan, region or workplace settings.

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