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// RUN — FITS
Can the Apple M2 Ultra 192GB run Phi-4?
Yes — here's how fast and up to what context, with real measured numbers.
Phi-4 on the Apple M2 Ultra 192GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 875k | 19.4-23.4 t/s | ~0.2-0.3 (slow) |
| Q8 | yes | 960k | 38.9-46.9 t/s | ~0.5-0.6 (slow) |
| Q4 | yes | 998k | 69.4-83.7 t/s | ~0.9-1 (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 M2 Ultra 192GB run Phi-4?▶
Yes. At Q4 it generates ~69.4-83.7 tok/s and fits up to 998k context; beyond that it spills to SSD swap and slows to ~0.9-1 tok/s.
How much context fits?▶
At Q4, up to about 998k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.