Yes — with 316.3 GB to spare

Mistral Small 4 119B-A6B at Q4_K_M fits your M3 Ultra · 512 GB entirely in unified memory at 8K context, at an estimated 57 tokens per second. There is room for its full 256K window.

Fully in unified memory 8K context Q4_K_M · 66.9 GB Apache 2.0 Released 17 Mar 2026 Vision Not in the Ollama library

Instruct, reasoning, vision and code in one 119B MoE. A latent KV cache (320 wide) keeps context cheap; the weights still want 64 GB+.

What hardware do I need for Mistral Small 4 119B-A6B? →

The VRAM budget

weights 66.9 GB

Weights 66.9 GB KV cache @ 8K 0.18 GB Runtime overhead 0.6 GB Free 316.3 GB of 384.0 GB

Quantisation ladder

Quant	Weights	Total @ 8K	Max context	Tok/s	Quality	Fit
Q8_0	117.8 GB	118.5 GB	256K	32	−0.1% ppl	Long context
Q6_K	90.9 GB	91.7 GB	256K	42	−0.4% ppl	Long context
Q5_K_M	78.5 GB	79.3 GB	256K	49	−0.8% ppl	Long context
Q4_K_M	66.9 GB	67.7 GB	256K	57	−1.9% ppl	Recommended
Q3_K_M	54.2 GB	54.9 GB	256K	71	−5.4% ppl	Long context
Q2_K	46.4 GB	47.2 GB	256K	82	−15% ppl	Long context

Quality is the published perplexity delta against f16 weights. Max context assumes an f16 KV cache; q8_0 roughly doubles it. This model uses multi-head latent attention, so its cache is a compressed latent rather than full K and V.

How to run it

llama.cpp LM Studio MLX

terminal

$ pip install mlx-lm
$ mlx_lm.generate --model mlx-community/Mistral-Small-4-119B-2603-4bit \
    --max-tokens 512 --prompt "Hello"

Apple's own array framework. The fastest path on Apple Silicon. More on MLX.

01Download is 66.9 GB. Keep it on an SSD — a first load off a spinning disk takes minutes.

02macOS caps what the GPU may wire down at about 384.0 GB of 512 GB. Raising it with iogpu.wired_limit_mb is possible, and risky.

03There is room to go to the model's full 256K context on this card.

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