Is the model free to use commercially?

Yes. The open weights are published free on Hugging Face and commercial use is permitted.

When does billing start for Search & Fetch calls?

Billing is scheduled to begin on October 31 at 16:00 UTC, after a period in which those calls are free for DeepSeek API users.

Where can I use DeepSeek-V4.1-Flash-1017?

It is available on DeepSeek's website, its app, and its API.

Large Language ModelsAI Coding AssistantsOpen-Source AIAI Watch (Impress)10m agoOct 19, 2026, 13:00 JST

DeepSeek releases DeepSeek-V4.1-Flash-1017 with free weights

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3 Key Points

What happened
DeepSeek released DeepSeek-V4.1-Flash-1017 on October 17, a minor update to DeepSeek-V4.1-Flash that it says tops all previous versions on reasoning, coding, agent tasks and visual benchmarks; weights are free on Hugging Face for commercial use.
Why it matters
The company says the update completes tasks faster and at lower cost than the previous version, and it is available on the website, app and API.
What to watch
Free Search & Fetch calls via DeepSeek Harness, Claude Code and Codex server-side tools end when billing starts October 31 at 16:00 UTC.

WHO IT HITSBusinesses building on DeepSeek's API, and developers using coding agents through Claude Code or Codex server-side tools, face a billing start on October 31 for Search & Fetch calls that are currently free.

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Context & Analysis

DeepSeek framed DeepSeek-V4.1-Flash-1017 as a minor update to DeepSeek-V4.1-Flash, yet says it surpasses every earlier version across reasoning, coding, agent tasks and visual benchmarks. The company also says the model finishes tasks faster and at lower cost than the previous version, and it published benchmark tables on X showing some scores well above other AI models.

The release is available on DeepSeek's website, app and API, and the open weights are free on Hugging Face for commercial use. DeepSeek says the model is optimized for DeepSeek Harness, Tencent CodeBuddy and WorkBuddy, and recommends upgrading to DeepSeek Harness v0.2.1-rc.1 or later for the best experience.

Search & Fetch calls through DeepSeek Harness, Claude Code and Codex server-side tools are currently free for DeepSeek API users. DeepSeek plans to start charging for them on October 31 at 16:00 UTC, which may shift how developers route those calls.

FAQ

Is the model free to use commercially?: Yes. The open weights are published free on Hugging Face and commercial use is permitted.
When does billing start for Search & Fetch calls?: Billing is scheduled to begin on October 31 at 16:00 UTC, after a period in which those calls are free for DeepSeek API users.
Where can I use DeepSeek-V4.1-Flash-1017?: It is available on DeepSeek's website, its app, and its API.

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