Qwen3.8 125B (6B active) Flash-Next
NVIDIA RTX Pro 6000 Blackwell · NInfer · 512 ctx
- generation:
- 172.0 tokens/s
- prompt processing (prefill):
- 5905.0 tokens/s
- quant:
- NVFP4 (NVFP4)
Reported by the source; GPU count, offloading and concurrent requests can change these figures. Prompt-processing speed is input throughput, not time to first token. Check the full setup before comparing.
User reports Qwen 3.8 Flash Next at 172.0 tok/s decode without speculative decoding on an RTX6000 96GB, at 512 context with non-expert weights downsampled from 16-bit to 8-bit. Setup is NInfer6000, the user's fork of NInfer, with NVFP4 quants and prefill at 5,905 tok/s on 512 tokens and 13,908 tok/s on 8,192 tokens. With MTP3 and --lm-head-draft the same setup reaches 274.8 tok/s at 512 and 401.3 tok/s at 8K. Keeping non-experts at 16-bit gives 118.0 tok/s without speculative decoding.