Compatibility Check
Can I Run Step 3.5 Flash on Apple M4 Ultra?
Yes — Apple M4 Ultra runs Step 3.5 Flash fully on GPU at the Q8_0 quantization.
Estimated ~5.3 tokens/sec on the Q8_0 quantization.
Full GPU
Best variant: Q8_0
Full GPU inference — 256 GB VRAM meets the 254.8 GB recommendation.
- GPU VRAM
- 256 GB
- Min VRAM (best fit)
- 225.4 GB
- Recommended VRAM
- 254.8 GB
- Estimated tok/s
- ~5.3
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Every Step 3.5 Flash quantization on Apple M4 Ultra
Each row runs the compatibility engine against your VRAM, RAM, and the model's requirements.
| Quantization | File Size | Min VRAM | Rec VRAM | Context | Verdict | Estimated tok/s |
|---|---|---|---|---|---|---|
| Q4_K_M | 98 GB | 112.7 GB | 127.4 GB | 8K / 8K | Full GPU | ~8.9 |
| Q5_K_M | 122.5 GB | 140.9 GB | 159.3 GB | 8K / 8K | Full GPU | ~7.8 |
| Q8_0Best fit | 196 GB | 225.4 GB | 254.8 GB | 8K / 8K | Full GPU | ~5.3 |
| FP16 | 392 GB | 450.8 GB | 509.6 GB | 8K / 8K | Can't Run | — |
Apple M4 Ultra is solid pick for Step 3.5 Flash
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