DeepSeek V4 - 1M Ultra-Long Context AI Assistant
DeepSeek V4 with 1 million token ultra-long context, leading in Agent capabilities, world knowledge, and reasoning performance in China and the open-source domain.
The all-new V4 surpasses all publicly evaluated open-source models, rivaling top-tier closed-source models.
What is DeepSeek V4
DeepSeek V4 is the next-generation LLM by DeepSeek with 1M ultra-long context, leading in Agent capabilities, world knowledge, and reasoning performance domestically and in the open-source domain.
1M Ultra-Long Context
DeepSeek V4 supports 1 million token ultra-long context with innovative attention mechanism combined with DSA sparse attention for globally leading long-context capability.
Superior Agent Capabilities
DeepSeek V4 Agent capabilities significantly improved, achieving the best performance among open-source models, with quality close to Opus 4.6 non-thinking mode.
Top-Tier Reasoning
In math, STEM, and competitive coding benchmarks, DeepSeek V4 surpasses all publicly evaluated open-source models, rivaling top-tier closed-source models.
Rich World Knowledge
DeepSeek V4 leads other open-source models in world knowledge benchmarks, only slightly behind top closed-source models like Gemini-Pro-3.1.
Why Choose DeepSeek V4
Smarter, faster, more reliable - DeepSeek V4 is cutting-edge AI technology from China.
DeepSeek V4 Core Features
Powerful AI capabilities - DeepSeek V4 boosts your work and life.
1M Ultra-Long Memory
DeepSeek V4 supports 1 million token ultra-long context for complex document analysis, summarization, and translation.
Agentic Coding
DeepSeek V4 Agent capabilities reach best open-source model level with excellent code and document generation.
Top-Tier Reasoning
Math, STEM, competitive coding benchmarks surpass all open-source models, rivaling GPT-4o, Claude 3.5.
Thinking Mode
Supports reasoning_effort parameter for thinking intensity (high/max). Complex tasks recommend thinking mode with max intensity.
Fast Response
V4-Flash provides faster and more economical API service with shorter average response time.
Creative Writing
Article writing, creative generation, copy optimization - DeepSeek V4 excels in various writing scenarios.
DeepSeek V4 Performance
Industry-leading performance metrics.
1M DeepSeek V4 Ultra-Long Context
DeepSeek V4 Ultra-Long Context
13B-49B DeepSeek V4 Active Parameters
DeepSeek V4 Active Parameters
< 100ms DeepSeek V4 Flash Response Time
DeepSeek V4 Flash Response Time
DeepSeek V4 User Testimonials
Hear what users say about DeepSeek V4.
DeepSeek V4's Agentic Coding is amazing! It has the best open-source model performance. The 1M context lets me process entire technical documents.
Zhang Engineer, Full-Stack Developer
Zhang Engineer
Full-Stack Developer
DeepSeek V4's document processing is incredible. Million-word reports summarized in seconds. So much time saved!
Li Product Manager, Tech Company
Li Product Manager
Tech Company
DeepSeek V4's reasoning power is truly impressive with rich world knowledge. It saved me a lot of research time.
Wang Researcher, Research Institute
Wang Researcher
Research Institute
DeepSeek V4 FAQ
Frequently asked questions about DeepSeek V4.
Start Using DeepSeek V4
Experience the all-new 1M ultra-long context next-generation AI assistant now.