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DeepSeek-V4.1-Flash-1017: Wish-Driven Programming Made Real

๐Ÿš€ DeepSeek-V4.1-Flash-1017 is here!โ€‹

Stronger benchmark performance, faster task completion, and shorter outputs than the previous versionโ€”a Pareto improvement in performance and cost. Now live on our website, app, and API.

๐Ÿ› ๏ธ Optimized for DeepSeek Harness, Tencent CodeBuddy, WorkBuddy, and more. Upgrade to DeepSeek Harness v0.2.1-rc.1 or later for the best experience with the new model.

DeepSWE v1.1 Pass@1 vs. cost per task for DeepSeek V4.1 Flash 1017, tested with the mini-swe-v2 harness.

๐ŸŽฎ Build complete projects from scratchโ€‹

DeepSeek-V4.1-Flash-1017 uses reinforcement learning with self-feedback to improve end-to-end project developmentโ€”from game creation to 3D modeling.

See it in action ๐Ÿ‘‡

Example 1: 3D modeling of the Forbidden City

Example 2: A web-based racing game

Example 3: A Portal 2 recreation built with the Godot engine

Example 4: Valley of Ages โ€” a 3D scene tracing the evolution from prehistoric times to the modern era

๐Ÿ” Search & Fetch APIs are now open to everyone!โ€‹

Powered by our in-house search engine, serving hundreds of millions of requests daily worldwide.

๐Ÿ’ฐ Each endpoint: $0.75 per 1,000 calls.

๐Ÿ“– Docs: API Guides - Search & Fetch

๐Ÿ“Œ Search & Fetch calls via server-side tools in DeepSeek Harness, Claude Code, and Codex are currently free for DeepSeek API users. Billing starts Oct 31, 2026, at 16:00 UTC.

๐Ÿ”“ Open-source releaseโ€‹

Get DeepSeek-V4.1-Flash-1017:

๐Ÿค— Hugging Face: https://huggingface.co/deepseek-ai/DeepSeek-V4.1-Flash-1017

๐Ÿ”— ModelScope: https://modelscope.cn/models/deepseek-ai/DeepSeek-V4.1-Flash-1017