Overview
DeepSeek broke out on the back of open weights, a free tier and strong reasoning/coding. Its deep-thinking (R1) mode excels at math, logic and code. Free on web and app — one of the first chat AIs to install in China.
Best for
- Code & debugging
- Math and logic
- Long-text analysis
Hands-on tips
- Turn on deep-thinking for hard problems
- Paste errors for accurate debugging
FAQ
Does DeepSeek work in China?
DeepSeek works directly in mainland China — no VPN required.
Is DeepSeek free?
DeepSeek is currently free to use.（Free on web/app）
What are alternatives to DeepSeek?
Consider 豆包, Kimi, ChatGPT.
What is DeepSeek best for?
Mainly for: Code & debugging, Math and logic, Long-text analysis.
