Can MacBook Pro M3 Max 128GB run Mistral-Small-4-119B-2603?
Apple · 128 GB LPDDR5 · 400 GB/s bandwidth ·
Mistral · 119.0B (active 6.5B) · MoE · model ctx up to 256K
Yes — the MacBook Pro M3 Max 128GB (128 GB LPDDR5) can run Mistral-Small-4-119B-2603. At Q4 with the default 8K context it needs ≈ 67.75 GB VRAM (weights 65.45 GB + KV cache 1.3 GB + 1 GB runtime overhead), which fits within 128 GB. Decode at Q4/8K: ≈ 39.2 tok/s (estimated, batch 1). FP16 needs ≈ 240.3 GB — does not fit on this card. Estimates come from memory-bandwidth math; rows tagged measured override estimates. Relative ranking is more reliable than absolute tok/s. Methodology.
Fit & speed by quant and context
Quant
Context
VRAM needed
Fits?
tok/s (decode)
Q4
4K
67.1 GB
Yes
39.2est.
Q4
8K default
67.75 GB
Yes
39.2est.
Q4
32K
71.65 GB
Yes
39.2est.
FP16
4K
239.65 GB
No
8.8est.
FP16
8K default
240.3 GB
No
8.7est.
FP16
32K
244.2 GB
No
8.5est.
Fits = weights + KV(ctx) + 1 GB overhead ≤ 95% of VRAM. Measured
anchors are context-agnostic; the fit verdict is recomputed per context. A missing tok/s
means the model is far beyond this card (offload-only territory).