llamaperf

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

on 2× AMD Radeon AI PRO R9700 32GB · vLLM-Radiance · 131,072 ctx

Tone: positiveAMD hardware
Sep 7, 2026
Throughput
78.1 t/s gen · 1512.0 tokens/s prompt processing (prefill)Prompt processing measures input prefill speed; it does not tell you the time to first token.
Quant
IQ4_XS (GGUF)
System RAM
128 GB

Use cases

visionlong-context

Summary

User reports custom kernels for RDNA4 giving roughly 3x generation speedup and roughly 30x prefill speedup over public vLLM-Radiance. Setup is dual R9700s with 128GB RAM. User also mentions work on the Muse Glimmer 30B dense model.