DeepSeek

A free chat assistant from Chinese lab DeepSeek, running its own V4 models on the web and in mobile apps.

ChatFreeby DeepSeek

What it is

DeepSeek is the chat app from Hangzhou DeepSeek Artificial Intelligence, a Chinese AI lab. You chat with it at chat.deepseek.com or in its iOS and Android apps, and it runs the company's own models, currently the DeepSeek V4 family, including V4.1-Flash. The same models are sold through a separate pay-per-token API.

It suits people who want a strong assistant at no cost, especially for reasoning, math and code. The chat app is free. The company is based in China, which matters to some users and organizations for privacy and compliance reasons, so read its privacy policy before sharing sensitive material.

Best for

Free access to a capable reasoning model
Coding and math questions
Developers who also want a low-cost API

Alternatives to DeepSeek

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