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Can the Apple M4 Max 128GB run SeaLLM-7B-v2.5?
Yes โ here's how fast and up to what context, with real measured numbers.
SeaLLM-7B-v2.5 on the Apple M4 Max 128GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 737k | 21.7-26.2 t/s | ~0.4-0.5 (slow) |
| Q8 | yes | 802k | 43.5-52.4 t/s | ~0.8-1 (slow) |
| Q4 | yes | 831k | 77.6-93.6 t/s | ~1.4-1.7 (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 SeaLLM-7B-v2.5?โถ
Yes. At Q4 it generates ~77.6-93.6 tok/s and fits up to 831k context; beyond that it spills to SSD swap and slows to ~1.4-1.7 tok/s.
How much context fits?โถ
At Q4, up to about 831k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.