Qwen3.8 125B (6B active) Flash-Next

User reports Qwen3.8 Flash-Next at 15.6 t/s generation and 109.6 t/s prefill on an AMD Strix Halo 128GB workstation. Setup is llama.cpp with UD-Q4_K_XL, F16 KV cache and flash attention, 40 GPU layers offloaded in a single inference slot with 2048 MiB prompt-cache capacity, configured to 262144 context. CPU-backed per-layer token embeddings make this a hybrid offload rather than a full-GPU test, and actual input/output lengths and cache hits are unreported.