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// RUN — FITS
Can the Apple M1 Ultra 128GB run ESM1b?
Yes — here's how fast and up to what context, with real measured numbers.
ESM1b on the Apple M1 Ultra 128GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 1715k | 416.9-502.8 t/s | ~5.2-6.3 (slow) |
| Q8 | yes | 1725k | 833.8-1005.5 t/s | ~10.4-12.6 (slow) |
| Q4 | yes | 1729k | 1489-1795.6 t/s | ~18.6-22.4 (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 ESM1b?▶
Yes. At Q4 it generates ~1489-1795.6 tok/s and fits up to 1729k context; beyond that it spills to SSD swap and slows to ~18.6-22.4 tok/s.
How much context fits?▶
At Q4, up to about 1729k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.