Apple M3 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 M3 Pro can run openai/gpt-oss-20b with Q4 quantization. At approximately 11 tokens/second, you can expect Basic speed - best for non-interactive tasks.
You have 26GB headroom, which is sufficient for system overhead and smooth operation.
| Quantization | VRAM needed | VRAM available | Estimated speed | Verdict |
|---|---|---|---|---|
| Q4 | 10GB | 36GB | 10.85 tok/s | ✅ Fits comfortably |
| Q8 | 20GB | 36GB | 8.24 tok/s | ✅ Fits comfortably |
| FP16 | 41GB | 36GB | 3.87 tok/s | ❌ Not recommended |