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

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## 🚀 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.

![](https://api-docs.deepseek.com/img/v4.1_261017_benchmark_table_en.png)

![](https://api-docs.deepseek.com/img/v4.1_261017_perf_cost_en.png)

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

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## 🎮 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**

![](https://api-docs.deepseek.com/img/v4.1_261017_case1.gif)

**Example 2: A web-based racing game**

![](https://api-docs.deepseek.com/img/v4.1_261017_case2.gif)

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

![](https://api-docs.deepseek.com/img/v4.1_261017_case3.gif)

**Example 4: Valley of Ages — a 3D scene tracing the evolution from prehistoric times to the modern era**

![](https://api-docs.deepseek.com/img/v4.1_261017_case4.gif)

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## 🔍 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](https://api-docs.deepseek.com/guides/search.md)

📌 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**.

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## 🔓 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>