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gpt-oss-120b-MXFP4-Q8

M3 Ultra (80c) · 512 GB · 4bit · 2026-03-08
Performance
1k
tokens
613.2
PP tok/s
68.4
TG tok/s
1670
TTFT (ms)
59.2
Peak mem (GB)
Hardware
Chip M3 Ultra (80c)
Memory 512 GB
GPU Cores 80
Software
oMLX v0.2.6
macOS macOS 15.5
Context 1,024
Performance by Context Length
Context PP tok/s TG tok/s Peak Mem
1k 613.2 68.4 59.2 GB current
4k 685.5 64.1 59.3 GB view
8k 687.8 57.8 59.5 GB view
16k 663.6 47.5 59.8 GB view
32k 600.7 35.2 60.4 GB view
Batching Results
Batch Size TG tok/s Speedup
68.4 1.00×
105.7 1.55×
145.9 2.13×
187.1 2.74×