Free chat assistant from DeepSeek, strong at reasoning, maths and code.
DeepSeek is the chat app from the Chinese lab of the same name, available on the web and on iOS and Android. It runs DeepSeek's own open-weight models and offers a reasoning mode that shows its step-by-step thinking, which suits maths, logic and programming questions. It can search the web and read uploaded files. The chat app is free to use, and developers can call the same models through a low-cost API.
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