WHALE: Joint model weight and harness optimization for agents
August 30, 2026
WHALE introduces a method for joint optimization of model parameters and executable harness code by alternating between online rejection-sampling fine-tuning and Meta-Harness searches.
HOW THIS AFFECTS YOU
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builderYou can improve agent reliability by optimizing the control flow logic alongside the model itself.
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researcherThis method challenges the assumption that optimizing weights alone is sufficient for agent performance.