Can Apple M3 Ultra run DeepSeek V4.1 Flash?

Q: Can Apple M3 Ultra run DeepSeek V4.1 Flash?

Yes. Measured 30.8 tok/s generation on Apple M3 Ultra, via oMLX v0.7.1.dev1, MTP enabled, not stated. Source: https://omlx.ai/benchmarks/performance/dvp1bn0s

Yes. Measured 30.8 tok/s generation (oMLX v0.7.1.dev1, MTP enabled, not stated; source).

Every measured result for DeepSeek V4.1 Flash on Apple M3 Ultra

Build	Quant / setup	Engine	tok/s
Mac Studio M3 Ultra 512 GB running DeepSeek V4.1 Flash with MTP	not stated	oMLX v0.7.1.dev1, MTP enabled	30.8	source

Memory: Apple M3 Ultra has 512 GB. DeepSeek V4.1 Flash weights are about 511 GB in its native format (vLLM recipe: 552B backbone + 196.6B Engram tables, 16B active per output token; official MXFP4/FP8 checkpoint ~511 GB). Arithmetic, not a measurement; long contexts need more. Check other quants in the VRAM calculator.

Speeds are decode (generation) tokens/sec as reported by each source; quant, engine and context differ, so small gaps are noise.

All measured speeds for DeepSeek V4.1 Flash: best home rig for DeepSeek V4.1 Flash.

DeepSeek V4.1 Flash on other hardware: 2x Tesla V100 32GB · RTX 5090

Other models measured on Apple M3 Ultra: DeepSeek R1 671B · MiniMax M3.1 Flash · Mistral Medium 3.5 128B · Muse Spark Open 816B-A42B · Qwen3.8 27B · gpt-oss 20B

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