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// RUN — FITS
Can the Apple M1 Ultra 128GB run FoundationStereo?
Yes — here's how fast and up to what context, with real measured numbers.
FoundationStereo on the Apple M1 Ultra 128GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 1725k | 811.2-978.2 t/s | ~10.1-12.2 (slow) |
| Q8 | yes | 1730k | 1622.4-1956.5 t/s | ~20.3-24.5 (slow) |
| Q4 | yes | 1732k | 2897.2-3493.7 t/s | ~36.2-43.7 (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 M1 Ultra 128GB run FoundationStereo?▶
Yes. At Q4 it generates ~2897.2-3493.7 tok/s and fits up to 1732k context; beyond that it spills to SSD swap and slows to ~36.2-43.7 tok/s.
How much context fits?▶
At Q4, up to about 1732k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.