Evaluation Flaws in Automatic LLM Agent Harness Evolution
July 13, 2026
Current harness evolution methods risk overfitting by using the same public benchmarks for both search and final evaluation. Effective comparison requires testing against task-level search baselines under matched feedback and inference budgets to isolate harness design gains from simple search-based scaling.
HOW THIS AFFECTS YOU
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researcherYou should use matched inference budgets to distinguish between harness improvements and search-driven performance gains.