Old Zhang's AI Learning

Apr 26, 2026 · Artificial Intelligence

Why Deploying DeepSeek‑V4 Locally with vLLM Is So Challenging

The article dissects DeepSeek‑V4’s local deployment using vLLM, explaining the steep hardware requirements, the complex heterogeneous KV‑cache architecture, and the aggressive kernel‑fusion and multi‑stream optimizations that together make high‑context inference both memory‑intensive and engineering‑heavy.