Qwen3.8 125B (6B active) Flash-Next
on AMD Strix Halo 128GB · llama.cpp
Summary
User benchmarks Qwen3.8-Flash-Next at 28.4 t/s decode and 314 t/s prefill on a Minisforum S1 Max with AMD Ryzen AI Max+ 395 and 128 GB unified memory.
Setup is llama.cpp (Vulkan, Unsloth build) with UD-Q4_K_XL weights and MTP speculative decoding at 56% accept rate.
The repo also lists community engine comparisons on the same hardware: gufo 34.1 t/s decode and 1,075 t/s prefill, Halogen 39.4/1,191, strixllama 29.7/716, and llama.cpp ROCm 20.5/285. The GGUF checkpoint uses a shared BF16 PLE of about 95 GiB that should stay NVMe-backed via mmap on 128 GB machines.