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// RUN — FITS
Can the Apple M1 Ultra 128GB run ProBERTa?
Yes — here's how fast and up to what context, with real measured numbers.
ProBERTa on the Apple M1 Ultra 128GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 1734k | 6181.8-7454.5 t/s | ~77.3-93.2 (slow) |
| Q8 | yes | 1734k | 12363.6-14909.1 t/s | ~154.5-186.4 (slow) |
| Q4 | yes | 1735k | 22077.9-26623.4 t/s | ~276-332.8 (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 M1 Ultra 128GB run ProBERTa?▶
Yes. At Q4 it generates ~22077.9-26623.4 tok/s and fits up to 1735k context; beyond that it spills to SSD swap and slows to ~276-332.8 tok/s.
How much context fits?▶
At Q4, up to about 1735k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.