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// RUN — FITS
Can the Apple M4 Max 128GB run S4?
Yes — here's how fast and up to what context, with real measured numbers.
S4 on the Apple M4 Max 128GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 1727k | 745.5-899 t/s | ~13.7-16.5 (slow) |
| Q8 | yes | 1731k | 1491.1-1798.1 t/s | ~27.3-32.9 (slow) |
| Q4 | yes | 1733k | 2662.7-3210.8 t/s | ~48.8-58.8 (slow) |
Estimate (memory-bound). Beyond "max context" the KV cache spills to SSD swap and speed drops to the "beyond" figure.
FAQ
Can the Apple M4 Max 128GB run S4?▶
Yes. At Q4 it generates ~2662.7-3210.8 tok/s and fits up to 1733k context; beyond that it spills to SSD swap and slows to ~48.8-58.8 tok/s.
How much context fits?▶
At Q4, up to about 1733k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.