Generating and Refining Dynamic Evaluation Rubrics for LLM-as-a-Judge
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Computer Science > Computation and Language
Title:Generating and Refining Dynamic Evaluation Rubrics for LLM-as-a-Judge
Abstract:LLM-as-a-Judge is a scalable alternative to human evaluation, yet existing rubric-based methods rely on human-annotated data such as reference answers or expert-crafted rubrics. We propose to automatically generate fine-grained evaluation rubrics without any human annotation. Our training-free method generates rubrics at dataset-specific and instance-specific granularities, achieving performance competitive with existing methods across four benchmarks. We further present a method that iteratively fine-tunes a rubric generator model via meta-judge reward signals. The fine-tuned generator outperforms all existing baselines in both pairwise and pointwise evaluation. Notably, a fine-tuned 14B rubric generator outperforms a much larger proprietary model at rubric generation, showing the effectiveness of our fine-tuning strategy.
| Subjects: | Computation and Language (cs.CL) |
| Cite as: | arXiv:2605.30568 [cs.CL] |
| (or arXiv:2605.30568v1 [cs.CL] for this version) | |
| https://doi.org/10.48550/arXiv.2605.30568
arXiv-issued DOI via DataCite (pending registration)
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