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gpt-oss-120b

M3 Ultra (80c) · 512 GB · 8bit · 2026-03-18

Performance

4k

tokens

1,251

PP tok/s

59.1

TG tok/s

3275

TTFT (ms)

116.2

Peak mem (GB)

Hardware

Chip M3 Ultra (80c)

Memory 512 GB

GPU Cores 80

Software

oMLX v0.2.18

macOS macOS 26.3.1

Context 4,096

Performance by Context Length

Context	PP tok/s	TG tok/s	Peak Mem
1k	1,096	63.1	116.1 GB	view
4k	1,251	59.1	116.2 GB	current

Batching Results

Batch Size	TG tok/s	Speedup
1×	63.1	1.00×
2×	86.2	1.37×
4×	108.9	1.73×
8×	134.8	2.14×