Summary
User reports Qwen3.8 Flash-Next at 41.5 t/s generation and 621.3 t/s prefill on an M4 Max 64GB.
Setup is ds4 with IQ2_XXS gate/up + Q2_K down; BF16 n-grams on SSD, one request, speculative decoding off.
First row (2,048-token prompt) of pswai's 64gb-mac-llm-bench, measured 2026-09-28. A source-reported measurement, not independently reproduced.