DeepSeek Chat
Free AI assistant from Chinese startup DeepSeek featuring R1 reasoning and V3 general models that rival GPT-4 at a fraction of the cost
Overview
DeepSeek Chat is a free AI assistant from Chinese AI startup DeepSeek that shocked the industry in January 2025 by releasing reasoning models matching OpenAI's o1 at 95% lower cost. The web interface offers unlimited free access to both DeepSeek R1 (reasoning model with chain-of-thought) and DeepSeek V3 (general assistant). R1's transparent thinking process, where you can watch the model reason step-by-step, has made it popular for math, coding, and complex problem-solving. The open-source model weights and rock-bottom API pricing have positioned DeepSeek as the cost-effective alternative to Western AI providers.
The Verdict
Who Should Use DeepSeek Chat?
Best For
- Budget-conscious users wanting GPT-4 quality free
- Math and reasoning tasks (R1 excels here)
- Developers seeking cheap API access
- Users who want to see AI thinking process
- Open-source enthusiasts (weights available)
Not Ideal For
- Users needing image/video generation
- Privacy-sensitive work (China-based servers)
- Real-time voice conversations
- Enterprise compliance requirements
- Users blocked in certain regions
What's Great
- Completely free web access—no usage limits
- R1 reasoning matches o1/Claude on math benchmarks
- Transparent chain-of-thought (see the thinking)
- API pricing 95% cheaper than OpenAI
- Open-source model weights (MIT license)
- Strong coding abilities, especially in Python
Watch Out For
- Text-only—no image, video, or voice support
- Chinese servers raise data privacy concerns
- Censorship on politically sensitive topics
- Service outages during peak demand
- Limited integrations and ecosystem
- No memory/personalization across sessions
Pricing
View all features & details
Models Available
- DeepSeek R1 (reasoning, chain-of-thought)
- DeepSeek V3 (general assistant, 671B MoE)
- DeepSeek Coder (code-specialized)
- R1 distilled versions (1.5B to 70B)
- Context: 64K tokens (R1), 128K tokens (V3)
Key Features
- Visible chain-of-thought reasoning
- Deep Think mode for complex problems
- Web search integration
- File upload & analysis
- Code execution (Python)
- Multi-turn conversations
Platforms
- Web (chat.deepseek.com)
- iOS app
- Android app
- API (OpenAI-compatible)
- Hugging Face (weights)
Technical Specs
- V3: 671B parameters (MoE, 37B active)
- R1: Built on V3 with RL for reasoning
- Training: 14.8T tokens
- Open weights: MIT license
- FP8 training (cost-efficient)
Real-World Usage
Rapid Growth
- Top free app in US App Store (Jan 2025)
- 20M+ monthly active users
- $500M training cost (vs $100B for GPT-4)
- Crashed due to demand on launch week
Industry Impact
- Nvidia stock dropped 17% on DeepSeek news
- Sparked "AI efficiency" debate
- Most downloaded AI app globally (Jan 2025)
- Open-sourced weights drove local AI adoption
How It Compares
| Feature | DeepSeek | ChatGPT | Claude | Gemini |
|---|---|---|---|---|
| Price | Free | $20/mo | $20/mo | $20/mo |
| Reasoning | R1 (visible CoT) | o1 (hidden) | Claude 3.5 | Gemini Pro |
| AIME 2024 | 90.8% | 83.3% | 78.2% | 73.4% |
| Multimodal | Text only | Text, image, video | Text, image | Text, image, video |
| API Cost (1M in) | $0.14 | $2.50 | $3.00 | $1.25 |
| Open Source | Yes (MIT) | No | No | No |
| Context | 128K | 128K | 200K | 1M |
| Best For | Reasoning, budget | All-in-one | Coding, writing | Google ecosystem |