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Comments on No. 70 of 109 · syfi.cs.washington.edu · edition of Friday 6 November 2026

VibeSys on Trainium: Agents Build/Tune Qwen3.8 Serving Engines on AWS Trainium2

Summary

VibeSys, a multi-agent system for generating bespoke inference engines, was used to build serving engines for two hybrid Qwen3.8 models on AWS Trainium2, where no open-source system supports them. On one chip, agents wrote a Qwen3.8-27B engine from a plain PyTorch reference, raising throughput from 195 to 861 tok/s.

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