DeepSeek V4 Preview Release | DeepSeek API Docs

News

DeepSeek-V4 Preview Release 2026/04/24

News

DeepSeek-V4 Preview Release 2026/04/24

🚀 DeepSeek-V4 Preview is officially live & open-sourced! Welcome to the era of cost-effective 1M context length.

🔹 DeepSeek-V4-Pro: 1.6T total / 49B active params. Performance rivaling the world's top closed-source models.

🔹 DeepSeek-V4-Flash: 284B total / 13B active params. Your fast, efficient, and economical choice.

Try it now at chat.deepseek.com via Expert Mode / Instant Mode. API is updated & available today!

📄 Tech Report: https://huggingface.co/deepseek-ai/DeepSeek-V4-Pro/blob/main/DeepSeek_V4.pdf

🤗 Open Weights: https://huggingface.co/collections/deepseek-ai/deepseek-v4

DeepSeek-V4-Pro​

🔹 Enhanced Agentic Capabilities: Open-source SOTA in Agentic Coding benchmarks. 🔹 Rich World Knowledge: Leads all current open models, trailing only Gemini-3.1-Pro. 🔹 World-Class Reasoning: Beats all current open models in Math/STEM/Coding, rivaling top closed-source models.

DeepSeek-V4-Flash​

🔹 Reasoning capabilities closely approach V4-Pro. 🔹 Performs on par with V4-Pro on simple Agent tasks. 🔹 Smaller parameter size, faster response times, and highly cost-effective API pricing.

Structural Innovation & Ultra-High Context Efficiency​

🔹 Novel Attention: Token-wise compression + DSA (DeepSeek Sparse Attention). 🔹 Peak Efficiency: World-leading long context with drastically reduced compute & memory costs. 🔹 1M Standard: 1M context is now the default across all official DeepSeek services.

Dedicated Optimizations for Agent Capabilities​

🔹 DeepSeek-V4 is seamlessly integrated with leading AI agents like Claude Code, OpenClaw & OpenCode. 🔹 Already driving our in-house agentic coding at DeepSeek.

The figure below showcases a sample PDF generated by DeepSeek-V4-Pro.

API is Available Today!​

🔹 Keep base_url, just update model to deepseek-v4-pro or deepseek-v4-flash. 🔹 Supports OpenAI ChatCompletions & Anthropic APIs. 🔹 Both models support 1M context & dual modes (Thinking / Non-Thinking): https://api-docs.deepseek.com/guides/thinking_mode

DeepSeek-V4-Pro

DeepSeek-V4-Flash

Structural Innovation & Ultra-High Context Efficiency

Dedicated Optimizations for Agent Capabilities

API is Available Today!