Harness Evolution Hits a Ceiling: When Weight Training Should Begin
Improving a long-horizon LLM agent means evolving the harness around a frozen model or training its weights. We let a self-evolving harness make the system stronger first, then cross seed and evolved harnesses with base and trained weights to learn which gains the trained model keeps and which still need the runtime. W...
Yuan Tian, Bing Hu, Hao Wang et al.
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