DeepSeek Review (2026)
Open-weight Chinese AI models that rival top assistants at a fraction of the cost. Best for: Free reasoning, math and coding help, and low-cost API usage.
What is DeepSeek?
DeepSeek is an AI lab based in Hangzhou, China, that drew worldwide attention in early 2025 when its reasoning model matched leading Western systems on many benchmarks while reportedly costing far less to train.
The company offers a free chat app on web and mobile and an API priced well below most competitors. Many of its models are released as open weights, so developers and companies can also run them on their own infrastructure.
What problems does DeepSeek solve?
Here are the concrete pain points DeepSeek addresses — and how it addresses them.
Expensive access to strong reasoning
DeepSeek provides capable reasoning in a free app and a low-cost API.
Vendor lock-in
Open-weight models can be self-hosted, giving teams more control over data and costs.
Hard math and logic problems
Its reasoning mode shows its chain of thought while working through problems.
High API bills for startups
Low token prices make prototypes and high-volume applications cheaper to run.
Key features and solutions
- Free chat app. Use DeepSeek's latest models on web, iOS and Android at no cost.
- Reasoning mode. Step-by-step thinking for math, science and code.
- Web search. Optional search for up-to-date answers.
- Open weights. Download models for local or private-cloud deployment.
- Affordable API. OpenAI-compatible API with aggressive pricing.
Best use cases for DeepSeek
- Solving math and programming exercises
- Building low-cost AI applications
- Running models on private servers
- Comparing reasoning approaches
- Everyday Q&A at no cost
Who it's for: Developers, students, researchers and cost-conscious companies — ideally those who have assessed the data-privacy implications.
DeepSeek pricing
The DeepSeek chat app is free. The API is pay-as-you-go per million tokens, typically much cheaper than comparable Western models. Open-weight models can be self-hosted at your own infrastructure cost. See the screenshot of the API pricing page for current rates.
Pros and cons
Pros
- Very capable for free
- Low API prices
- Open-weight models available
- Transparent reasoning output
Cons
- Data stored in China raises privacy and compliance questions
- Restricted by some governments and organisations
- Answers on politically sensitive topics are censored
DeepSeek vs alternatives
How DeepSeek compares with ChatGPT, Le Chat by Mistral, Claude:
| DeepSeek | ChatGPT | Le Chat by Mistral | Claude | |
|---|---|---|---|---|
| Category | AI Chatbots & Assistants | AI Chatbots & Assistants | AI Chatbots & Assistants | AI Chatbots & Assistants |
| Best for | Free reasoning, math and coding help, and low-cost API usage | Everyday writing, brainstorming, analysis and multimodal tasks | European users and businesses wanting a fast, GDPR-friendly assistant | Long-document work, nuanced writing and software development |
| Pricing model | Free app + paid API | Freemium | Freemium | Freemium |
| Free plan | Yes | Yes | Yes | Yes |
| Developer | DeepSeek (Hangzhou, China) | OpenAI | Mistral AI (Paris, France) | Anthropic |
| Platforms | Web, iOS, Android, API | Web, iOS, Android, macOS, Windows | Web, iOS, Android | Web, iOS, Android, macOS, Windows |
Verdict
DeepSeek offers remarkable capability for the price, and its open models are valuable for self-hosting. Businesses handling sensitive data should review its privacy terms carefully or use the open weights on their own servers; for a privacy-focused alternative, Le Chat by Mistral is worth comparing.
Try DeepSeek ↗DeepSeek FAQ
Is DeepSeek free?
Yes, the chat app is free. The API is paid but inexpensive.
Is DeepSeek safe to use?
It is functional and widely used, but data from the hosted app is stored in China. Avoid sharing sensitive information or self-host the open models.
Can I run DeepSeek locally?
Yes. Many DeepSeek models are released as open weights, though the largest ones need powerful hardware.