DeepSeek Releases V4.1-Flash-1017 and Opens Search & Fetch APIs

Key Info

DeepSeek released DeepSeek-V4.1-Flash-1017, which it describes as a Pareto improvement in performance and cost over the previous version, and opened its in-house Search & Fetch APIs to everyone at $0.75 per 1,000 calls per endpoint.

Highlights

• The new model offers stronger benchmark performance, faster task completion and shorter outputs, and is live on the website, app and API.
• It is optimized for DeepSeek Harness, Tencent CodeBuddy, WorkBuddy and more; users should upgrade to DeepSeek Harness v0.2.1-rc.1 or later.
• Search & Fetch APIs are powered by an in-house search engine serving hundreds of millions of requests daily worldwide.
• Search & Fetch calls via server-side tools in DeepSeek Harness, Claude Code and Codex are free for DeepSeek API users until billing starts Oct 31, 2026, at 16:00 UTC.
• The model is open-sourced on Hugging Face and ModelScope.