DeepSeek is an AI lab and chat assistant. Its web chat offers a DeepThink reasoning mode and a Search option, and the same models are available through a mobile app, a desktop agent product and an API Platform with documentation for developers. The official DeepSeek-V4.1-Flash release brings improvements in text and agent performance along with native multimodal visual understanding. The model family spans V3, V3.1, V3.2, R1, V4 and V4.1, and research publications for these releases are listed alongside the products.
DeepSeek serves everyday users who want a capable chat assistant for writing, questions and analysis, and developers who call the models through the API Platform to build their own apps. Researchers and engineers follow the V3, R1 and V4 releases to study or compare model capabilities, and teams that want agent workflows can look at the desktop agent product. Students and professionals can use the chat on the web or install the app on their phone by scanning the QR code, with the interface available in English and Chinese.
A student can switch on DeepThink to work through a multi-step problem and see the reasoning before the answer. A professional can ask the assistant to search for current information and summarize it. A developer can integrate a DeepSeek model into a product through the API, check the API docs and pricing, and monitor uptime on the service status page. A team experimenting with agents can try the desktop agent product. Users who need to interpret an image can try the multimodal understanding that arrived with V4.1 Flash.
