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

User compares Qwen3.8-Flash-Next and its Swift 1.5 fine-tune across Halogen, gufo and llama.cpp on a Strix Halo 128GB machine, all with MTP. The gufo run with Unsloth's UD-Q4_K_XL decodes at 42-46 t/s with 966-1,186 t/s prefill at a 32k prompt and 64k context. Setup is gufo with the 111.3 GB UD-Q4_K_XL GGUF and Unsloth's shared Q8_0 MTP head; TTFT was 20-27 s and server start 25 s. Halogen's own .hgn build decodes faster at 51-60 t/s, and llama.cpp trails at 20-23 t/s decode and 298-320 t/s prefill. The user suggests gufo with the Swift requant for coding, which finished the 11 Pi tasks in 24 min against 33 min for Unsloth's file on gufo.