🚀 DeepSeek-V4.1-Flash-1017 is here!
Stronger benchmark performance, faster task completion, and shorter outputs than the previous version—a Pareto improvement in performance and cost. Now live on our website, app, and API.
🛠️ 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.
🎮 Build complete projects from scratch
DeepSeek-V4.1-Flash-1017 uses reinforcement learning with self-feedback to improve end-to-end project development—from game creation to 3D modeling.
See it in action 👇
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 — a 3D scene tracing the evolution from prehistoric times to the modern era
🔍 Search & Fetch APIs are now open to everyone!
Powered by our in-house search engine, serving hundreds of millions of requests daily worldwide.
💰 Each endpoint: $0.75 per 1,000 calls.
📖 Docs: API Guides - Search & Fetch
📌 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.
🔓 Open-source release
Get DeepSeek-V4.1-Flash-1017:
🤗 Hugging Face: https://huggingface.co/deepseek-ai/DeepSeek-V4.1-Flash-1017
🔗 ModelScope: https://modelscope.cn/models/deepseek-ai/DeepSeek-V4.1-Flash-1017