DeepSeek releases V4.1-Flash-1017 with enhanced performance and reduced costs

On October 17, 2026, DeepSeek announced the release of its V4.1-Flash-1017 version, updating its official website, app, and API models. The new version achieves a Pareto improvement in performance and cost efficiency, with improved model capabilities and reduced task execution time and output length, leading to lower overall costs per call. DeepSeek highlighted that the new model enables users to complete tasks more efficiently and at a lower cost, reaching new Pareto optimal points in performance and cost across multiple platforms. The update also includes optimizations for DeepSeek Harness, Tencent CodeBuddy, and WorkBuddy, with recommendations for users to upgrade to version 0.2.1-rc.1 or higher to fully benefit from the improvements. Additionally, the V4.1-Flash-1017 version introduces enhanced zero-shot project-building capabilities through self-feedback reinforcement learning, supporting scenarios like game development and 3D modeling. DeepSeek claims this allows the model to fulfill 'wish-based' programming requests, generating executable projects with minimal input. The model weights are now available for download on HuggingFace and ModelScope, continuing the MIT license open-source strategy.