Beyond Rubrics: Exploration-Guided Evaluation Skills for Reward Modeling

In three linesEval-Skill, an exploration-guided method, synthesizes reusable evaluation skills for reward modeling without rigid rubrics. Trained on 100 cases per domain, the system progressively generates workflows and principles injected directly into the judge's context. On RewardBench 2, gains of +13.44% (Qwen3-8B) and +18.51% (DeepSeek-V4-Flash).

Summary generated by Claude — human-verified