DeepSeek
Fast, Free AI Chat and Coding Help
DeepSeek is a free AI chat assistant and open source model platform offering fast, accurate answers and coding help.
What is DeepSeek
DeepSeek is an AI company from China that builds smart chat and reasoning models. You can use it for free through its website or mobile app to ask questions, get help with writing, or solve coding problems. Instead of just giving short answers, DeepSeek can think through hard problems step by step, which makes it strong at math, coding, and reasoning tasks.
Developers can also use DeepSeek through an API that works the same way as OpenAI and Anthropic tools, so it is easy to plug into existing apps. DeepSeek also shares its model files openly, so anyone can download them, run them on their own computers, or build new tools on top of them.
Features of DeepSeek
Free web and mobile chat assistant
Step by step thinking mode for hard problems
Strong coding and debugging support
1 million token long context window
File upload for PDF, Word, Excel, and more
OpenAI and Anthropic compatible API
Tool calling and JSON output
Open source model weights on GitHub and Hugging Face
Works with coding tools like Claude Code and Cline
DeepSeek Pricing
Free (Web & App)
- Unlimited free chat on web and mobile
- Step by step thinking mode
- File upload and document analysis
- Coding help and debugging
API - DeepSeek-V4-Flash
- $0.14 per 1M input tokens
- $0.0028 per 1M tokens on cache hit
- $0.28 per 1M output tokens
- 1 million token context window
- 384K max output tokens
API - DeepSeek-V4-Pro
- $0.435 per 1M input tokens
- $0.003625 per 1M tokens on cache hit
- $0.87 per 1M output tokens
- 1 million token context window
- 384K max output tokens
DeepSeek Use Cases
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