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gpt-oss-20b-MXFP4-Q8

M5 Max (40c) · 128 GB · 4bit · 2026-04-26
Performance
1k
tokens
1,458
PP tok/s
124.5
TG tok/s
703
TTFT (ms)
11.8
Peak mem (GB)
Hardware
Chip M5 Max (40c)
Memory 128 GB
GPU Cores 40
Software
oMLX v0.3.7
macOS macOS 26.4.1
Context 1,024
Performance by Context Length
Context PP tok/s TG tok/s Peak Mem
1k 1,458 124.5 11.8 GB current
4k 3,424 110.2 11.8 GB view
Batching Results
Batch Size TG tok/s Speedup
124.5 1.00×
168.5 1.35×
220.4 1.77×