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// RUN — FITS
Can the Apple M4 Max 128GB run Segatron XL large, M=384?
Yes — here's how fast and up to what context, with real measured numbers.
Segatron XL large, M=384 on the Apple M4 Max 128GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 1727k | 722.3-871.1 t/s | ~13.2-16 (slow) |
| Q8 | yes | 1731k | 1444.7-1742.1 t/s | ~26.5-31.9 (slow) |
| Q4 | yes | 1733k | 2579.8-3110.9 t/s | ~47.2-57 (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 Segatron XL large, M=384?▶
Yes. At Q4 it generates ~2579.8-3110.9 tok/s and fits up to 1733k context; beyond that it spills to SSD swap and slows to ~47.2-57 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.