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// RUN — FITS
Can the Apple M3 Max 36GB run OPT-6.7B?
Yes — here's how fast and up to what context, with real measured numbers.
OPT-6.7B on the Apple M3 Max 36GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 134k | 15.2-18.4 t/s | ~0.5-0.6 (slow) |
| Q8 | yes | 185k | 30.4-36.7 t/s | ~1-1.2 (slow) |
| Q4 | yes | 207k | 54.4-65.6 t/s | ~1.8-2.2 (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 M3 Max 36GB run OPT-6.7B?▶
Yes. At Q4 it generates ~54.4-65.6 tok/s and fits up to 207k context; beyond that it spills to SSD swap and slows to ~1.8-2.2 tok/s.
How much context fits?▶
At Q4, up to about 207k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.