Apple M4 Max meets the minimum VRAM requirement for Q4 inference of openai/gpt-oss-120b. Review the quantization breakdown below to see how higher precision settings impact VRAM and throughput.
Apple M4 Max can run openai/gpt-oss-120b with Q4 quantization. At approximately 16 tokens/second, you can expect Basic speed - best for non-interactive tasks.
You have 69GB headroom, which is sufficient for system overhead and smooth operation.
| Quantization | VRAM needed | VRAM available | Estimated speed | Verdict |
|---|---|---|---|---|
| Q4 | 59GB | 128GB | 15.79 tok/s | ✅ Fits comfortably |
| Q8 | 117GB | 128GB | 9.42 tok/s | ✅ Fits comfortably |
| FP16 | 235GB | 128GB | 5.33 tok/s | ❌ Not recommended |