Graders should cheat: privileged information enables expert-level automated evaluations

Fuente: arXiv
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Autores principales: Zhou, Jin Peng, Arnold, Sébastien M. R., Ding, Nan, Weinberger, Kilian Q., Hua, Nan, Sha, Fei
Formato: Preprint
Publicado: 2025
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author Zhou, Jin Peng
Arnold, Sébastien M. R.
Ding, Nan
Weinberger, Kilian Q.
Hua, Nan
Sha, Fei
author_facet Zhou, Jin Peng
Arnold, Sébastien M. R.
Ding, Nan
Weinberger, Kilian Q.
Hua, Nan
Sha, Fei
contents Auto-evaluating language models (LMs), i.e., using a grader LM to evaluate the candidate LM, is an appealing way to accelerate the evaluation process and the cost associated with it. But this presents a paradox: how can we trust the grader LM, which is presumably weaker than the candidate LM, to assess problems that are beyond the frontier of the capabilities of either model or both? For instance, today's LMs struggle on graduate-level physics and Olympiad-level math, making them unreliable graders in these domains. We show that providing privileged information -- such as ground-truth solutions or problem-specific guidelines -- improves automated evaluations on such frontier problems. This approach offers two key advantages. First, it expands the range of problems where LMs graders apply. Specifically, weaker models can now rate the predictions of stronger models. Second, privileged information can be used to devise easier variations of challenging problems which improves the separability of different LMs on tasks where their performance is generally low. With this approach, general-purpose LM graders match the state of the art performance on RewardBench, surpassing almost all the specially-tuned models. LM graders also outperform individual human raters on Vibe-Eval, and approach human expert graders on Olympiad-level math problems.
format Preprint
id arxiv_https___arxiv_org_abs_2502_10961
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Graders should cheat: privileged information enables expert-level automated evaluations
Zhou, Jin Peng
Arnold, Sébastien M. R.
Ding, Nan
Weinberger, Kilian Q.
Hua, Nan
Sha, Fei
Machine Learning
Artificial Intelligence
Auto-evaluating language models (LMs), i.e., using a grader LM to evaluate the candidate LM, is an appealing way to accelerate the evaluation process and the cost associated with it. But this presents a paradox: how can we trust the grader LM, which is presumably weaker than the candidate LM, to assess problems that are beyond the frontier of the capabilities of either model or both? For instance, today's LMs struggle on graduate-level physics and Olympiad-level math, making them unreliable graders in these domains. We show that providing privileged information -- such as ground-truth solutions or problem-specific guidelines -- improves automated evaluations on such frontier problems. This approach offers two key advantages. First, it expands the range of problems where LMs graders apply. Specifically, weaker models can now rate the predictions of stronger models. Second, privileged information can be used to devise easier variations of challenging problems which improves the separability of different LMs on tasks where their performance is generally low. With this approach, general-purpose LM graders match the state of the art performance on RewardBench, surpassing almost all the specially-tuned models. LM graders also outperform individual human raters on Vibe-Eval, and approach human expert graders on Olympiad-level math problems.
title Graders should cheat: privileged information enables expert-level automated evaluations
topic Machine Learning
Artificial Intelligence
url https://arxiv.org/abs/2502.10961