DeepSeek V4.1 Flash is a 748.49B-parameter mixture-of-experts model (16B active per token). At Q2_K it needs about 265.3 GB of memory. The NVIDIA DGX Spark 128GB has 119 GB usable, so it only fits with part of the model offloaded to system RAM, which slows it down. Expect about 12 tokens/sec (5.4–18), with the first token after 1.2 s for a short prompt. This estimate is projected from the hardware specs; no benchmarks exist yet.
| Quantization | File size | Memory | Generation | First token | Source |
|---|---|---|---|---|---|
| Q2_K | 264.5 GB | Partial offload | 12 tok/s | 1.2 s | Projected |
| Q3_K_M | 347.3 GB | Doesn't fit | Won't run | — | — |
| Q4_K_M | 444.7 GB | Doesn't fit | Won't run | — | — |
| MXFP4 | 507.9 GB | Doesn't fit | Won't run | — | — |
All models on the NVIDIA DGX Spark 128GB · DeepSeek V4.1 Flash 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.