Qwen3.8 27B
M4 Max 64GB · llama.cpp
- generation:
- 23.9 tokens/s
- prompt processing (prefill):
- 119.9 tokens/s
- quant:
- Q4_K_M (GGUF)
- mtp (multi-token prediction):
- off
User reports Qwen3.8 27B at 23.9 t/s generation and 119.9 t/s prompt processing on an M4 Max 64GB. Setup is llama.cpp (llama-server 0.4.0-dev, Metal) with Q4_K_M, --ctx-size 4096, --parallel 1, -b 4096, -ub 1024, flash attention on, no prompt cache, and speculation disabled. The headline Quick Chat run used 87 prompt tokens and 96 output tokens, with TG 23.88856 t/s and PP 119.88656 t/s as medians of three measured requests after one discarded warmup.