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Accurate and consistent evaluation is crucial for decision-making across numerous fields, yet it remains a challenging task due to inherent subjectivity, variability, and scale. Large Language Models (LLMs) have achieved remarkable success…

Large language models (LLMs) are increasingly integral to information retrieval (IR), powering ranking, evaluation, and AI-assisted content creation. This widespread adoption necessitates a critical examination of potential biases arising…

Information Retrieval · Computer Science 2025-07-11 Krisztian Balog , Donald Metzler , Zhen Qin

As large language models (LLMs) grow in capability and autonomy, evaluating their outputs-especially in open-ended and complex tasks-has become a critical bottleneck. A new paradigm is emerging: using AI agents as the evaluators themselves.…

Artificial Intelligence · Computer Science 2025-08-06 Fangyi Yu

Large language models (LLMs) are being widely applied across various fields, but as tasks become more complex, evaluating their responses is increasingly challenging. Compared to human evaluators, the use of LLMs to support performance…

Artificial Intelligence · Computer Science 2025-04-25 Yuran Li , Jama Hussein Mohamud , Chongren Sun , Di Wu , Benoit Boulet

Large language models (LLMs) are increasingly used as automated judges to evaluate recommendation systems, search engines, and other subjective tasks, where relying on human evaluators can be costly, time-consuming, and unscalable. LLMs…

Computation and Language · Computer Science 2025-02-10 Gerrit J. J. van den Burg , Gen Suzuki , Wei Liu , Murat Sensoy

Large language models (LLMs) are increasingly deployed across healthcare applications, including clinical documentation, diagnostic reasoning, medicine recommendation, and medical education. Their outputs are largely unstructured clinical…

Computers and Society · Computer Science 2026-05-26 Lingyao Li , Deyi Li , Chen Chen , Renkai Ma , Runlong Yu , Mingquan Lin , Rui Yin , Lizhou Fan , Cathy Shyr , Siyuan Ma , Mei Liu , Steven Bethard

LLM-as-a-judge is a framework where a large language model (LLM) evaluates the output of another LLM. While LLMs excel at producing qualitative textual evaluations, they often struggle to predict human preferences and numeric scores. We…

As large language models (LLMs) are increasingly deployed in high-stakes settings, their ability to refuse ethically sensitive prompts-such as those involving hate speech or illegal activities-has become central to content moderation and…

Human-Computer Interaction · Computer Science 2025-05-22 Stefan Pasch

Existing LLM-as-a-Judge systems suffer from three fundamental limitations: limited adaptivity to task- and domain-specific evaluation criteria, systematic biases driven by non-semantic cues such as position, length, format, and model…

Computation and Language · Computer Science 2026-02-09 Bo Yang , Lanfei Feng , Yunkui Chen , Yu Zhang , Xiao Xu , Shijian Li

Employing Large Language Models (LLMs) to assess the quality of generated responses, such as prompting instruct-tuned models or fine-tuning judge models, has become a widely adopted evaluation method. It is also known that such evaluators…

Computation and Language · Computer Science 2024-10-08 Junsoo Park , Seungyeon Jwa , Meiying Ren , Daeyoung Kim , Sanghyuk Choi

Evaluating large language model (LLM) based chat assistants is challenging due to their broad capabilities and the inadequacy of existing benchmarks in measuring human preferences. To address this, we explore using strong LLMs as judges to…

Large Language Models are cognitively biased judges. Large Language Models (LLMs) have recently been shown to be effective as automatic evaluators with simple prompting and in-context learning. In this work, we assemble 15 LLMs of four…

Computation and Language · Computer Science 2024-09-26 Ryan Koo , Minhwa Lee , Vipul Raheja , Jong Inn Park , Zae Myung Kim , Dongyeop Kang

Evaluating the conversational abilities of large language models (LLMs) remains a challenging task. Current mainstream approaches primarily rely on the "LLM-as-a-judge" paradigm, where an LLM is prompted to serve as an evaluator to assess…

Computation and Language · Computer Science 2026-01-07 Yuqi Tang , Kehua Feng , Yunfeng Wang , Zhiwen Chen , Chengfei Lv , Gang Yu , Qiang Zhang , Keyan Ding , Huajun Chen

Due to the implement of guardrails by developers, Large language models (LLMs) have demonstrated exceptional performance in explicit bias tests. However, bias in LLMs may occur not only explicitly, but also implicitly, much like humans who…

Computation and Language · Computer Science 2025-03-05 Xinru Lin , Luyang Li

We present the first systematic evaluation examining format bias in performance of large language models (LLMs). Our approach distinguishes between two categories of an evaluation metric under format constraints to reliably and accurately…

Computation and Language · Computer Science 2025-02-25 Do Xuan Long , Hai Nguyen Ngoc , Tiviatis Sim , Hieu Dao , Shafiq Joty , Kenji Kawaguchi , Nancy F. Chen , Min-Yen Kan

Large language model (LLM)-based judges are widely adopted for automated evaluation and reward modeling, yet their judgments are often affected by judgment biases. Accurately evaluating these biases is essential for ensuring the reliability…

Computation and Language · Computer Science 2026-03-10 Hongli Zhou , Hui Huang , Rui Zhang , Kehai Chen , Bing Xu , Conghui Zhu , Tiejun Zhao , Muyun Yang

Recent advances in Large Language Models (LLMs) have incentivized the development of LLM-as-a-judge, an application of LLMs where they are used as judges to decide the quality of a certain piece of text given a certain context. However,…

Computation and Language · Computer Science 2026-01-21 Xiaolin Zhou , Zheng Luo , Yicheng Gao , Qixuan Chen , Xiyang Hu , Yue Zhao , Ruishan Liu

LLM-as-Judge has emerged as a scalable alternative to human evaluation, enabling large language models (LLMs) to provide reward signals in trainings. While recent work has explored multi-agent extensions such as multi-agent debate and…

Artificial Intelligence · Computer Science 2025-09-19 Chiyu Ma , Enpei Zhang , Yilun Zhao , Wenjun Liu , Yaning Jia , Peijun Qing , Lin Shi , Arman Cohan , Yujun Yan , Soroush Vosoughi

Large Language Models (LLMs) have revolutionized natural language processing, but their susceptibility to biases poses significant challenges. This comprehensive review examines the landscape of bias in LLMs, from its origins to current…

Computation and Language · Computer Science 2026-05-04 Yufei Guo , Muzhe Guo , Juntao Su , Zhou Yang , Mengqiu Zhu , Hongfei Li , Mengyang Qiu , Shuo Shuo Liu

The zero-shot capability of Large Language Models (LLMs) has enabled highly flexible, reference-free metrics for various tasks, making LLM evaluators common tools in NLP. However, the robustness of these LLM evaluators remains relatively…

Computation and Language · Computer Science 2024-05-06 Rickard Stureborg , Dimitris Alikaniotis , Yoshi Suhara