Device-specific formats · 4K context

DeepSeek-V4.1-Flash MoE model with 552B total parameters and 16B active per token · 264.5GB Q2_K model file · working memory unconfirmed

An MoE model with a 552B backbone and separate Engram tables. Published runs on Spark, RTX 5090, and high-memory Macs are separated by hardware and format, including experimental paths that require SSD streaming and dedicated runtimes.

Q2_K model file
264.5GB · memory-mapped paging
total parameters
552B
active parameter
16B
native context
1024K

Representative equipment to run this model

DGX Spark 128GB

available 116GB · 273GB/s

CUDA-cMoE · mmap demand paging · text only

Decode

2.8 tok/s · Published CUDA-cMoE reference

First token

2155.8 s · Not a direct TTFT measurement

Studio M3 Ultra 512GB

available 480GB · 819GB/s

oMLX 0.7.0.dev2 · Lightning MTP on · Engram resident in RAM

Decode

23.1 ~ 41.0 tok/s

First token

7.1 to 12.6 seconds

Running Guide

DeepSeek-V4.1-Flash Local Serving Run Recipe

Selecting a device changes the quantization, safety context, GPU offload, Flash Attention, KV cache, and batch start values.

Speed tuning for each device

If you want to choose equipment again

You can first narrow down the model configurations based on budget, noise level, operating system and whether it's acceptable used.