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// RUN — FITS
Can the Apple M1 Ultra 64GB run ULM-FiT?
Yes — here's how fast and up to what context, with real measured numbers.
ULM-FiT on the Apple M1 Ultra 64GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 843k | 616.8-743.8 t/s | ~7.7-9.3 (slow) |
| Q8 | yes | 849k | 1233.6-1487.5 t/s | ~15.4-18.6 (slow) |
| Q4 | yes | 852k | 2202.8-2656.3 t/s | ~27.5-33.2 (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 M1 Ultra 64GB run ULM-FiT?▶
Yes. At Q4 it generates ~2202.8-2656.3 tok/s and fits up to 852k context; beyond that it spills to SSD swap and slows to ~27.5-33.2 tok/s.
How much context fits?▶
At Q4, up to about 852k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.