GLM-5.3 Flash is a 321.3B-parameter mixture-of-experts model (18B active per token). Smaller quantizations need less memory and run faster, at some cost in quality. Below is the expected speed on each piece of hardware at the best quantization that fits.
| Hardware | Quantization | Memory | Generation | First token |
|---|---|---|---|---|
| H200 141GB (cloud) | UD-IQ3_XXS | Fits | 287 tok/s | 0.3 s |
| NVIDIA RTX PRO 6000 96GB | UD-IQ1_S | Partial offload | 90 tok/s | 1.2 s |
| MacBook Pro M5 Max 128GB | UD-IQ1_S | Fits | 60 tok/s | 0.4 s |
| Mac Studio M4 Max 128GB | UD-IQ1_S | Fits | 54 tok/s | 0.4 s |
| Mac Studio M5 Ultra 512GB | UD-Q4_K_XL | Fits | 51 tok/s | 0.3 s |
| AMD Ryzen AI Max+ 395 128GB (Strix Halo) | UD-Q2_K_XL | Fits | 26 tok/s | 0.5 s |
| Mac Studio M3 Ultra 512GB | UD-Q4_K_XL | Fits | 20 tok/s | 0.4 s |
| NVIDIA DGX Spark 128GB | UD-Q2_K_XL | Fits | 18 tok/s | 0.3 s |
| CPU-only (Ryzen 9 9950X, 96GB DDR5) | UD-IQ1_S | Partial offload | 14 tok/s | 2.0 s |
| NVIDIA RTX 3090 24GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| NVIDIA RTX 5090 32GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| NVIDIA RTX 4090 24GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| NVIDIA RTX 5060 Ti 16GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| AMD RX 7900 XTX 24GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| NVIDIA RTX 3060 12GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| NVIDIA RTX 5070 Ti 16GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| AMD RX 9070 XT 16GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| Intel Arc Pro B70 32GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| Mac Mini M4 Pro 64GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| AMD Radeon AI PRO R9700 32GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| NVIDIA RTX 5080 16GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| MacBook Pro M5 Pro 48GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| AMD RX 7900 XT 20GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| NVIDIA RTX 4070 Ti Super 16GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| MacBook M4 Pro 24GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| NVIDIA RTX 4070 12GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| MacBook M3 Max 48GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| MacBook M2 Pro 16GB | UD-IQ1_S | Doesn't fit | Won't run | — |
| H100 80GB (cloud) | UD-IQ1_S | Doesn't fit | Won't run | — |
| A100 80GB (cloud) | UD-IQ1_S | Doesn't fit | Won't run | — |
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.