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gpt-oss-20b-MXFP4-Q8

M5 Pro (20c) · 64 GB · 4bit · 2026-07-01

Performance

16k

tokens

2,220

PP tok/s

71.3

TG tok/s

7381

TTFT (ms)

12.3

Peak mem (GB)

Hardware

Chip M5 Pro (20c)

Memory 64 GB

GPU Cores 20

Software

oMLX v0.4.4

macOS macOS 26.5.1

Context 16,384

Performance by Context Length

Context	PP tok/s	TG tok/s	Peak Mem
8k	2,137	79.4	11.9 GB	view
16k	2,220	71.3	12.3 GB	current
64k	1,568	43.9	14.0 GB	view