DeepSeek
By DeepSeek · chat.deepseek.com ↗
A free Chinese assistant built on DeepSeek's own open-weight models, known for strong reasoning at low cost.
DeepSeek's app launched in January 2025 and topped the US App Store within a week. Its models are released as open weights under the MIT licence, so anyone can download and run them.
What it can do
- Conversation, writing and coding
- Step-by-step reasoning for maths and logic
- 1-million-token context with the V4 models
- Developer API compatible with OpenAI and Anthropic tools
How to start
WebiPhone & iPadAndroid
- Go to chat.deepseek.com or install the DeepSeek app
- Sign up and start chatting; choose the expert or instant mode
Pricing
Free app; the API is paid per use
Things to know
- Follows Chinese censorship rules on sensitive topics
- Privacy and data-collection concerns have drawn regulatory scrutiny in several countries