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Overestimation in evaluating large language models (LLMs) has become an increasing concern. Due to the contamination of public benchmarks or imbalanced model training, LLMs may achieve unreal evaluation results on public benchmarks, either…

Computation and Language · Computer Science 2026-05-26 Zi Liang , Liantong Yu , Shiyu Zhang , Qingqing Ye , Haibo Hu

Dataset contamination, where evaluation datasets overlap with pre-training corpora, inflates performance metrics and undermines the reliability of model evaluations. Measuring dataset contamination thus becomes essential to ensure that…

Machine Learning · Computer Science 2025-05-22 Hyeong Kyu Choi , Maxim Khanov , Hongxin Wei , Yixuan Li

Large Language Models (LLMs) have recently gained significant attention due to their remarkable capabilities in performing diverse tasks across various domains. However, a thorough evaluation of these models is crucial before deploying them…

Automated clinical text anonymization has the potential to unlock the widespread sharing of textual health data for secondary usage while assuring patient privacy and safety. Despite the proposal of many complex and theoretically successful…

Computation and Language · Computer Science 2024-06-05 David Pissarra , Isabel Curioso , João Alveira , Duarte Pereira , Bruno Ribeiro , Tomás Souper , Vasco Gomes , André V. Carreiro , Vitor Rolla

Human feedback plays a pivotal role in aligning large language models (LLMs) with human preferences. However, such feedback is often noisy or inconsistent, which can degrade the quality of reward models and hinder alignment. While various…

Artificial Intelligence · Computer Science 2025-10-15 Samuel Yeh , Sharon Li

The deployment of Large Language Models (LLMs) in high-stakes clinical settings demands rigorous and reliable evaluation. However, existing medical benchmarks remain static, suffering from two critical limitations: (1) data contamination,…

Artificial Intelligence · Computer Science 2026-02-12 Zhiling Yan , Dingjie Song , Zhe Fang , Yisheng Ji , Xiang Li , Quanzheng Li , Lichao Sun

As Large Language Models (LLMs) become increasingly prevalent, their generated outputs are proliferating across the web, risking a future where machine-generated content dilutes human-authored text. Since online data is the primary resource…

Computation and Language · Computer Science 2025-09-23 George Drayson , Emine Yilmaz , Vasileios Lampos

Large language models (LLMs) have achieved impressive performance across various natural language benchmarks, prompting a continual need to curate more difficult datasets for larger LLMs, which is costly and time-consuming. In this paper,…

Computation and Language · Computer Science 2024-06-07 Jiahao Ying , Yixin Cao , Yushi Bai , Qianru Sun , Bo Wang , Wei Tang , Zhaojun Ding , Yizhe Yang , Xuanjing Huang , Shuicheng Yan

Large Language Models (LLMs) are foundational to AI advancements, facilitating applications like predictive text generation. Nonetheless, they pose risks by potentially memorizing and disseminating sensitive, biased, or copyrighted…

Artificial Intelligence · Computer Science 2024-03-26 Youyang Qu , Ming Ding , Nan Sun , Kanchana Thilakarathna , Tianqing Zhu , Dusit Niyato

Data filtering strategies are a crucial component to develop safe Large Language Models (LLM), since they support the removal of harmful contents from pretraining datasets. There is a lack of research on the actual impact of these…

Computation and Language · Computer Science 2026-03-24 Marco Antonio Stranisci , Christian Hardmeier

Large Language Models (LLMs) demonstrate remarkable capabilities, but their training on massive corpora poses significant risks from memorized sensitive information. To mitigate these issues and align with legal standards, unlearning has…

Computation and Language · Computer Science 2025-11-18 Ruichen Qiu , Jiajun Tan , Jiayue Pu , Honglin Wang , Xiao-Shan Gao , Fei Sun

Large language models (LLMs) are gaining increasing popularity in both academia and industry, owing to their unprecedented performance in various applications. As LLMs continue to play a vital role in both research and daily use, their…

Computation and Language · Computer Science 2024-01-01 Yupeng Chang , Xu Wang , Jindong Wang , Yuan Wu , Linyi Yang , Kaijie Zhu , Hao Chen , Xiaoyuan Yi , Cunxiang Wang , Yidong Wang , Wei Ye , Yue Zhang , Yi Chang , Philip S. Yu , Qiang Yang , Xing Xie

Data contamination poses a significant challenge to the fairness of LLM evaluations in natural language processing tasks by inadvertently exposing models to test data during training. Current studies attempt to mitigate this issue by…

Computation and Language · Computer Science 2025-11-25 Jingqian Zhao , Bingbing Wang , Geng Tu , Yice Zhang , Qianlong Wang , Bin Liang , Jing Li , Ruifeng Xu

This study investigates how Large Language Models (LLMs) leverage source and reference data in machine translation evaluation task, aiming to better understand the mechanisms behind their remarkable performance in this task. We design the…

Computation and Language · Computer Science 2024-06-07 Xu Huang , Zhirui Zhang , Xiang Geng , Yichao Du , Jiajun Chen , Shujian Huang

While Large Language Models (LLMs) are fundamentally next-token prediction systems, their practical applications extend far beyond this basic function. From natural language processing and text generation to conversational assistants and…

Computation and Language · Computer Science 2025-03-10 Vishakha Agrawal , Archie Chaudhury , Shreya Agrawal

Amid the expanding use of pre-training data, the phenomenon of benchmark dataset leakage has become increasingly prominent, exacerbated by opaque training processes and the often undisclosed inclusion of supervised data in contemporary…

Computation and Language · Computer Science 2024-04-30 Ruijie Xu , Zengzhi Wang , Run-Ze Fan , Pengfei Liu

The rapid emergence of Large Language Models (LLMs) has precipitated a profound paradigm shift in Artificial Intelligence, delivering monumental engineering successes that increasingly impact modern society. However, a critical paradox…

Computation and Language · Computer Science 2026-03-13 Zeyu Gan , Ruifeng Ren , Wei Yao , Xiaolin Hu , Gengze Xu , Chen Qian , Huayi Tang , Zixuan Gong , Xinhao Yao , Pengwei Tang , Zhenxing Dou , Yong Liu

While large language models (LLMs) can already achieve strong performance on standard generic summarization benchmarks, their performance on more complex summarization task settings is less studied. Therefore, we benchmark LLMs on…

Computation and Language · Computer Science 2024-07-15 Yixin Liu , Alexander R. Fabbri , Jiawen Chen , Yilun Zhao , Simeng Han , Shafiq Joty , Pengfei Liu , Dragomir Radev , Chien-Sheng Wu , Arman Cohan

Unlocking the potential of Large Language Models (LLMs) in data classification represents a promising frontier in natural language processing. In this work, we evaluate the performance of different LLMs in comparison with state-of-the-art…

Computation and Language · Computer Science 2025-01-16 Arina Kostina , Marios D. Dikaiakos , Dimosthenis Stefanidis , George Pallis

We explore machine unlearning (MU) in the domain of large language models (LLMs), referred to as LLM unlearning. This initiative aims to eliminate undesirable data influence (e.g., sensitive or illegal information) and the associated model…