Old Zhang's AI Learning

Aug 17, 2026 · Artificial Intelligence

How Many GPUs Does Kimi K3 Need? Self‑Hosting vs API Cost Comparison

The article breaks down Kimi K3’s 2.8‑trillion‑parameter architecture, explains its 4‑bit MXFP4 quantization, calculates the ~1.4 TB memory requirement, shows that 8‑GPU clusters (e.g., NVIDIA B300 or AMD MI350X) are needed for self‑hosting, and compares these costs with the per‑token API pricing, highlighting when each option is economical.