Compatibility Check
Can I Run GPT-OSS 120B on Apple M4 Max?
Yes — Apple M4 Max runs GPT-OSS 120B fully on GPU at the Q5_K_M quantization.
Estimated ~6.3 tokens/sec on the Q5_K_M quantization.
Full GPU
Best variant: Q5_K_M
Full GPU inference — 128 GB VRAM meets the 97.5 GB recommendation.
- GPU VRAM
- 128 GB
- Min VRAM (best fit)
- 86.3 GB
- Recommended VRAM
- 97.5 GB
- Estimated tok/s
- ~6.3
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Every GPT-OSS 120B quantization on Apple M4 Max
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 | 60 GB | 69 GB | 78 GB | 8K / 8K | Full GPU | ~7.3 |
| Q5_K_MBest fit | 75 GB | 86.3 GB | 97.5 GB | 8K / 8K | Full GPU | ~6.3 |
| Q8_0 | 120 GB | 138 GB | 156 GB | 8K / 8K | Can't Run | — |
| FP16 | 240 GB | 276 GB | 312 GB | 8K / 8K | Can't Run | — |
Apple M4 Max is solid pick for GPT-OSS 120B
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