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

User reports Qwen3.8 Flash-Next at 15 t/s on an RTX 5070 12GB, with prompt processing at 100-120 t/s. Setup is llama.cpp with a 3 bpw IQ3_XXS GGUF (76GB total, 47GB sharded into VRAM+RAM, rest on SSD) at up to 128K context. Generation held 13.8 t/s at 1K, 14.6 t/s at 8K, 14.0 t/s at 20K, and 11.3 t/s at 90-100K context. User rates output quality as matching Unsloth Q6-Q8.