Agent harness optimization mostly improves execution reliability, not task reach

Using pass@k curves, the authors show that apparent gains over stronger baselines can reverse at larger attempt budgets and hide shortfalls on hard tasks.

Top University
Younghyun Kim · Wooseok Seo · Minseo Kim · Seunghyuk Oh · Minjae Lee · Donghoon Kim · +3 more

FuriosaAI · Yonsei University · University of California, Berkeley

Research Digest··2 min read
The authors systematically compare language model agents before and after harness optimization, which adjusts prompts, context, and execution logic without changing weights.

Kim et al.

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