Apple · 128 GB LPDDR5X · 546 GB/s bandwidth ·
Google · 11.95B · model ctx up to 256K
Yes — the MacBook Pro M4 Max 128GB (128 GB LPDDR5X) can run gemma-4-12b-it. At Q4 with the default 8K context it needs ≈ 9.96 GB VRAM (weights 6.57 GB + KV cache 2.39 GB + 1 GB runtime overhead), which fits within 128 GB. Decode at Q4/8K: ≈ 29.1 tok/s (estimated, batch 1). FP16 (≈ 27.29 GB) also fits, at ≈ 8.0 tok/s (estimated). 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
8.77 GB
Yes
29.1est.
Q4
8K default
9.96 GB
Yes
29.1est.
Q4
32K
17.13 GB
Yes
29.1est.
FP16
4K
26.09 GB
Yes
8.0est.
FP16
8K default
27.29 GB
Yes
8.0est.
FP16
32K
34.46 GB
Yes
8.0est.
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).