DeepSeek is a free AI chat app from the Chinese lab DeepSeek, built on its own open-weight models. It offers web search, a Deep-Think reasoning mode and file uploads at no cost, which makes it popular with cost-conscious users and developers.
DeepSeek at a glance
Made by | DeepSeek (Hangzhou DeepSeek AI) |
|---|---|
Price | Free |
Model | DeepSeek-V4.1-Flash-1017 (per DeepSeek's changelog) |
Platforms | Web, iOS, Android |
Key features
Web search and Deep-Think mode for harder problems.
File upload with text extraction.
Chat history synced across devices.
What to know
DeepSeek publishes no consumer usage limits or paid tier.
It's a Chinese company, so review its privacy terms before sharing sensitive work.
Developers can build on the separate DeepSeek App API.
Our take
For a free assistant, DeepSeek is remarkably capable, especially in Deep-Think mode. It's a great second opinion for coding and math. Keep confidential work in a tool whose data terms you're comfortable with.
DeepSeek alternatives
Facts checked against DeepSeek's official download page and changelog on November 13, 2026.
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