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// RUN — FITS
Can the Apple M1 Ultra 128GB run Codestral Mamba?
Yes — here's how fast and up to what context, with real measured numbers.
Codestral Mamba on the Apple M1 Ultra 128GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 756k | 37.3-45 t/s | ~0.5-0.6 (slow) |
| Q8 | yes | 812k | 74.7-90 t/s | ~0.9-1.1 (slow) |
| Q4 | yes | 836k | 133.3-160.8 t/s | ~1.7-2 (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 128GB run Codestral Mamba?▶
Yes. At Q4 it generates ~133.3-160.8 tok/s and fits up to 836k context; beyond that it spills to SSD swap and slows to ~1.7-2 tok/s.
How much context fits?▶
At Q4, up to about 836k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.