llamaperf

Qwen3.8 27B

on M5 Max 128GB · AX Engine

Apple hardware
Oct 6, 2026
Throughput
76.7 t/s gen · 792.4 tokens/s prompt processing (prefill)Prompt processing measures input prefill speed; it does not tell you the time to first token.
Quant
MXFP4 (MLX)
System RAM
128 GB

Summary

User reports Qwen 3.8 27B AXQ MXFP4 MTP at 76.70 tok/s decode and 792.4 tok/s prefill on an M5 Max 128 GB. Setup is AX Engine 7.5.3 with MXFP4 MTP weights, median of 20 runs on the flappy suite. The same campaign measured the 6-bit pack at 76.04 / 768.7 and long_code at 72.71 / 856.9; MTPLX 2.11.2 reached 63.91 / 697.3 and mlx-lm 34.20 on the MXFP4 pack.