Qwen3.8 27B
on NVIDIA RTX 5090 · crit · 262,000 ctx
Summary
User reports an engine built with the crit toolkit running Qwen3.8-27B at 216 tok/s decode and 8,917 tok/s prefill on an RTX 5090.
Setup is a from-scratch engine generated by Claude Opus 5.5 from the crit repository, with 262K context and +0.3% perplexity versus the reference.
The build took 3.5 hours with almost no intervention, and the user says it performs in the same league as dedicated engines like NInfer.