DeepSeek is a general AI assistant for questions, content creation, document reading, and programming, available as a web or mobile conversation product and as an API for developers. The app supports multi-turn work with web search, a thinking mode, file upload, text extraction, and synchronized chat history for signed-in users, while the API returns model responses inside a developer-controlled application.
Mobile access requires login by email, Google account, or Apple ID and installation through an official store or download channel. API clients must send at least one correctly structured message and select an available model; image input is restricted to the documented vision model and JPEG, PNG, GIF, or WebP content, and generated answers still require review appropriate to the consequences of the task.