Qwen 3.8 Flash-Next is a 180B-parameter mixture-of-experts model (6B active per token). At GSQ-RCO-IQ3_S it needs about 84.4 GB of memory. The CPU-only (Ryzen 9 9950X, 96GB DDR5) has 89 GB usable, so it fits entirely in memory. Expect about 22 tokens/sec (19–25), with the first token after 0.4 s for a short prompt. This estimate is interpolated from benchmarks of similar setups.
| Quantization | File size | Memory | Generation | First token | Source |
|---|---|---|---|---|---|
| Q2_K | 80.9 GB | Fits | 22 tok/s | 0.4 s | Derived |
| GSQ-RCO-IQ3_S | 83.6 GB | Fits | 22 tok/s | 0.4 s | Derived |
| Q3_K_M | 92.0 GB | Partial offload | 23 tok/s | 1.5 s | Projected |
| IQ4_XS | 97.7 GB | Partial offload | 21 tok/s | 1.5 s | Projected |
| UD-Q4_K_XL | 111.3 GB | Partial offload | 17 tok/s | 1.5 s | Projected |
| Q4_K_M | 119.6 GB | Partial offload | 16 tok/s | 1.5 s | Projected |
| Q8_0 | 188.3 GB | Partial offload | 9.0 tok/s | 1.5 s | Projected |
| FP16 | 354.0 GB | Doesn't fit | Won't run | — | — |
All models on the CPU-only (Ryzen 9 9950X, 96GB DDR5) · Qwen 3.8 Flash-Next on all hardware
Estimates for a short prompt on a single device. Measured numbers come from community benchmarks (r/LocalLLaMA, localscore.ai and more); others are derived from similar setups or projected from specs. Open source on GitHub.