What is DeepSeek V4? Complete Guide to the Free AI Model
Introduction
DeepSeek V4 is the latest generation large language model from DeepSeek, a Chinese AI company that has been making waves in the artificial intelligence industry. Released in early 2026, DeepSeek V4 represents a significant leap forward in AI capabilities while maintaining the company's commitment to cost-effectiveness and accessibility.
In this comprehensive guide, we'll explore everything you need to know about DeepSeek V4 - from its capabilities and benchmarks to how you can access it for free.
Key Takeaways
- DeepSeek V4 is completely free to use via NoteLM.ai
- Matches or exceeds GPT-5 in many benchmarks, especially math (92%) and coding (90%)
- 128K context window for processing long documents
- No subscription required - just start using it
- Open weights model providing transparency
What Makes DeepSeek V4 Special?
DeepSeek V4 achieves performance comparable to GPT-5 and Claude Opus while being completely free. This is revolutionary in an industry where top-tier AI typically costs $20-200/month.
2. Exceptional Math and Coding
DeepSeek V4 scores 92% on the MATH benchmark and 90% on HumanEval for coding - these scores rival or exceed the best paid AI models.
3. 128K Context Window
With a 128K token context window, DeepSeek V4 can process entire codebases, long documents, and extensive conversations without losing context.
4. Multi-Language Excellence
DeepSeek V4 supports 50+ languages with particularly strong performance in English, Chinese, and major world languages.
DeepSeek V4 Benchmarks
| Benchmark | DeepSeek V4 | GPT-5 | Claude Opus | Gemini 3 |
|---|
| MATH | 92% | 90% | 89% | 86% |
| HumanEval (Coding) | 90% | 91% | 92% | 85% |
| MMLU | 89% | 91% | 90% | 87% |
| Reasoning | Excellent | Excellent | Exceptional | Good |
How to Access DeepSeek V4 for Free
Method 1: NoteLM.ai (Recommended)
The easiest way to access DeepSeek V4 for free:
- 1.Visit NoteLM.ai/free-deepseek-v4
- 2.Start chatting immediately - no account required
- 3.Use the API for development projects
You can also access DeepSeek models directly:
- 1.Visit chat.deepseek.com
- 2.Create a free account
- 3.Start using DeepSeek V4
Method 3: Self-Hosting
For developers who want full control:
- 1.Download weights from DeepSeek's model hub
- 2.Set up local inference (requires significant GPU resources)
- 3.Full customization available
Use Cases for DeepSeek V4
Coding & Development
- Code generation in 50+ languages
- Debugging and code review
- API development
- Documentation writing
Mathematics
- Complex problem solving
- Step-by-step solutions
- Calculus, algebra, statistics
- Proof verification
Writing & Content
- Blog posts and articles
- Email drafting
- Creative writing
- Technical documentation
Research & Analysis
- Paper analysis
- Literature review
- Data interpretation
- Report writing
DeepSeek V4 vs ChatGPT: Quick Comparison
| Feature | DeepSeek V4 | ChatGPT Plus |
|---|
| Price | Free | $20/month |
| Math Score | 92% | 88% |
| Coding Score | 90% | 87% |
| Image Gen | No | Yes (DALL-E 3) |
| Context | 128K | 128K |
For text-based tasks, DeepSeek V4 offers better performance for free. ChatGPT Plus is only better if you need image generation.
Is DeepSeek V4 Safe?
DeepSeek V4 includes standard safety measures:
- Content moderation for harmful outputs
- Refusal to assist with illegal activities
- Privacy-focused design
For privacy-sensitive applications, NoteLM.ai processes requests without storing conversation data.
Q1Is DeepSeek V4 really free?
Yes, DeepSeek V4 is 100% free to use via NoteLM.ai. No subscription, no credit card, no hidden fees.
Q2How does DeepSeek V4 compare to GPT-5?
DeepSeek V4 matches GPT-5 in math (92% vs 90%) and is close in coding (90% vs 91%). GPT-5 has multi-modal capabilities that DeepSeek V4 lacks.
Q3Can I use DeepSeek V4 for commercial projects?
Yes, DeepSeek V4 has a permissive license allowing commercial use.
Q4What languages does it support?
DeepSeek V4 supports 50+ languages with excellent performance in English, Chinese, Japanese, Korean, and major European languages.
DeepSeek V4 represents a paradigm shift in AI accessibility. For the first time, anyone can access GPT-5 level AI capabilities completely free. Whether you're a developer, student, researcher, or just curious about AI, DeepSeek V4 on NoteLM.ai provides the tools you need without the price tag.
Ready to try DeepSeek V4? Start chatting for free →