Qwen3.8 125B (6B active) Flash-Next
on Unknown GPU
Summary
User asks for a Vulkan/radv-based inference engine that reaches over 1400 tok/s prefill for Qwen3.8 Flash-Next Q4, and reports their own tiny engine gets around 50 tok/s decode but prefill stuck below 1k tok/s.
They suspect the gap is the Vulkan versus HIP/ROCm implementation. No GPU or system memory is named.