Apple M2 Ultra~60 tok/s (Q4)

mlx-community/gpt-oss-20b-MXFP4-Q8 speed on Apple M2 Ultra

Quantization-specific throughput and VRAM requirements for mlx-community/gpt-oss-20b-MXFP4-Q8 running on Apple M2 Ultra.

Speed Snapshot

Topline estimate from compatibility data

Modelmlx-community/gpt-oss-20b-MXFP4-Q8

GPUApple M2 Ultra

Q4 speed60 tok/s

Q4 VRAM required10GB

Data Source

Calculation and benchmark status

Speed values come from the compatibility dataset (`estimatedTokensPerSec`) and are sorted by quantization.

For full verdict logic and alternate GPUs, see the canonical compatibility page.

Quantization Speed Table

Quantization	VRAM needed	VRAM available	Speed	Verdict
Q4	10GB	192GB	60 tok/s	✅ Fits
Q8	20GB	192GB	45 tok/s	✅ Fits
FP16	41GB	192GB	24 tok/s	✅ Fits