Apple M4 Pro meets the minimum VRAM requirement for Q4 inference of openai/gpt-oss-20b. Review the quantization breakdown below to see how higher precision settings impact VRAM and throughput.
Apple M4 Pro can run openai/gpt-oss-20b with Q4 quantization. At approximately 18 tokens/second, you can expect Basic speed - best for non-interactive tasks.
You have 54GB headroom, which is sufficient for system overhead and smooth operation.
| Quantization | VRAM needed | VRAM available | Estimated speed | Verdict |
|---|---|---|---|---|
| Q4 | 10GB | 64GB | 18.33 tok/s | ✅ Fits comfortably |
| Q8 | 20GB | 64GB | 14.74 tok/s | ✅ Fits comfortably |
| FP16 | 41GB | 64GB | 7.98 tok/s | ✅ Fits comfortably |