# DeepSeek V4.1-Flash-1017 and DeepInfer release > Live situation record from CLSTR: https://clstr.news/situations/deepseek-v41-flash-1017-ai-model-release > Updated: 2026-10-21T18:21:00.000Z. Sources: 44. Developments: 3. DeepSeek has released V4.1-Flash-1017, an updated version of its Flash AI model. The company characterizes the release as a “Pareto improvement” in both performance and cost, noting that the model is faster and produces shorter outputs than previous versions. Technical specifications indicate the model is a sparse mixture-of-experts model featuring a 552B-parameter backbone. It shows improvements in reasoning, coding, agentic tasks, and visual benchmarks. Specifically, the model scored 77.0 on the DeepSWE v1.1 coding benchmark, up from 74.2 in the predecessor. The update utilizes reinforcement learning with self-feedback (RLSF) and employs compressed KV caching to achieve lower costs and faster execution. The model's enhanced capabilities extend to agentic tasks such as 3D modeling and game development. Alongside the model, DeepSeek has opened its Search and Fetch APIs to all users, allowing AI agents and RAG applications to access live web content. The Search API provides structured data, while the Fetch API returns content in Markdown format; both are priced at $0.75 per 1,000 successful requests. The model weights have been released under the MIT license on Hugging Face and ModelScope, a move that intensifies competition between China’s open-weight models and proprietary models from US-based companies. DeepSeek has further expanded its ecosystem with the release of DeepInfer, an open-source software infrastructure designed to run AI models at lower costs. DeepInfer supports the V4.1-Flash model and is compatible with both Nvidia Blackwell GPUs and Huawei Ascend 950 chips. By utilizing distributed inference techniques, the system aims to optimize resource consumption and reduce energy use. ## Claims - The updated model provides faster task completion and shorter outputs compared to the previous version. (corroborated by 21 sources) - DeepSeek released the V4.1-Flash-1017 model on October 17, 2026. (corroborated by 14 sources) - The Search and Fetch APIs are now open to all users. (corroborated by 11 sources) - The model weights for V4.1-Flash-1017 are released under the MIT license. (corroborated by 9 sources) - The V4.1-Flash-1017 update delivers a Pareto improvement in performance and cost. (corroborated by 8 sources) - API pricing for the Flash model remains unchanged following the update. (corroborated by 8 sources) - The model uses reinforcement learning with self-feedback (RLSF) to improve project development. (corroborated by 7 sources) - The Search and Fetch API endpoints cost $0.75 per 1,000 calls. (corroborated by 7 sources) - The model is optimized for tools including DeepSeek Harness, Tencent CodeBuddy, and WorkBuddy. (corroborated by 4 sources) ## Timeline ### 2026-10-21: DeepSeek releases DeepInfer open-source infrastructure and V4.1 Flash model DeepSeek has launched DeepInfer, an open-source infrastructure to lower AI running costs, alongside an upgraded V4.1 Flash model featuring improved reasoning and coding capabilities. 4 sources. https://clstr.news/cluster/deepseek-releases-deepinfer-open-source-infrastructure-and-v41-flash-model ### 2026-10-17: Technology and cybersecurity sectors report major AI and threat updates DeepSeek releases its V4.1 Flash AI model, Amazon promotes wearable AI, and international coalitions disrupt major cybercrime operations and state-backed hacking groups. 7 sources. https://clstr.news/cluster/technology-and-cybersecurity-sectors-report-major-ai-and-threat-updates ### 2026-10-17: DeepSeek releases V4.1-Flash-1017 AI model with improved efficiency DeepSeek released the V4.1-Flash-1017 AI model, claiming improved performance and lower costs. The update includes open-weight release under MIT license and new Search and Fetch APIs for developers. 34 sources. https://clstr.news/cluster/deepseek-releases-v41-flash-model-and-new-search-apis --- Cite as: DeepSeek V4.1-Flash-1017 and DeepInfer release. CLSTR, https://clstr.news/situations/deepseek-v41-flash-1017-ai-model-release