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gpt-oss-20b-MXFP4-Q8

M4 Max (40c) · 48 GB · 4bit · 2026-05-12

Performance

1k

tokens

977.7

PP tok/s

110.7

TG tok/s

1047

TTFT (ms)

11.8

Peak mem (GB)

Hardware

Chip M4 Max (40c)

Memory 48 GB

GPU Cores 40

Software

oMLX v0.3.9.dev1

macOS macOS 26.4.1

Context 1,024

Performance by Context Length

Context	PP tok/s	TG tok/s	Peak Mem
1k	977.7	110.7	11.8 GB	current
4k	1,446	102.7	11.8 GB	view

Batching Results

Batch Size	TG tok/s	Speedup
1×	110.7	1.00×
2×	152.9	1.38×
4×	193.9	1.75×