Price: Free, unlimited chat. Pay-as-you-go API from $0.14 per million tokens.
Platforms: Web · iOS · Android
Free plan: yes
API available: yes
Open source: yes
Available in Spanish: yes
What is DeepSeek?
DeepSeek is the chatbot from the Chinese company of the same name, known for offering top-tier reasoning models (V4 and R1) completely free and unlimited on web and mobile. Its models are open-weight and its API is one of the cheapest on the market, which has made it the budget alternative to ChatGPT and Claude for developers and demanding users.
Pros
- Completely free chat, with no daily limits or paywalled features
- Open-weight models you can run or audit yourself
- Extremely cheap API (~10x less than equivalent competitors)
- Strong performance at reasoning and coding
Cons
- 'Server busy' notices at peak times
- Chinese company: its data policy raises concerns in corporate settings
- No image generation and no app ecosystem like ChatGPT's
Frequently asked questions
Is DeepSeek really free?
Yes. The chat on the web and mobile apps is free with no message limits; only the developer API is pay-as-you-go.
Does DeepSeek work in Spanish?
Yes, it understands and replies fluently in Spanish, although its interface is mainly in English and Chinese.
Are its models open source?
It releases its models with open weights (such as V4 and R1), which can be downloaded and run on your own hardware.