Summary
User reports Qwen3.8 Flash-Next at ~35 t/s decode and ~475 t/s prefill on an RTX 5070 Ti Laptop 12GB with 60 GB system RAM.
Setup is the Flyweight engine with an IQ1_S GGUF, running MoE experts on CPU or split with a hot set cached on the GPU.
Other measurements on the same laptop: Qwen3.8 27B IQ2_XXS at ~40 t/s, DeepSeek-V4-Flash at 6-7 t/s, and Z-Image 1024x1024 in ~15 s with a 35B model loaded alongside.