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Related papers: Investigating Data Contamination in Modern Benchma…

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Multimodal Large Language Models (MLLMs) show impressive vision-language benchmark performance, yet growing concerns about data contamination (test set exposure during training) risk masking true generalization. This concern extends to…

Artificial Intelligence · Computer Science 2025-06-10 Ming Liu , Wensheng Zhang

The problem of data contamination is now almost inevitable during the development of large language models (LLMs), with the training data commonly integrating those evaluation benchmarks even unintentionally. This problem subsequently makes…

Computation and Language · Computer Science 2025-09-19 Ruijie Hou , Yueyang Jiao , Hanxu Hu , Yingming Li , Wai Lam , Huajian Zhang , Hongyuan Lu

The development of large language models (LLMs) depends on trustworthy evaluation. However, most current evaluations rely on public benchmarks, which are prone to data contamination issues that significantly compromise fairness. Previous…

Computation and Language · Computer Science 2025-06-05 Kejian Zhu , Shangqing Tu , Zhuoran Jin , Lei Hou , Juanzi Li , Jun Zhao

Hampering the interpretation of benchmark scores, evaluation data contamination has become a growing concern in the evaluation of LLMs, and an active area of research studies its effects. While evaluation data contamination is easily…

Computation and Language · Computer Science 2024-11-07 Aaditya K. Singh , Muhammed Yusuf Kocyigit , Andrew Poulton , David Esiobu , Maria Lomeli , Gergely Szilvasy , Dieuwke Hupkes

We propose the Data Contamination Quiz (DCQ), a simple and effective approach to detect data contamination in large language models (LLMs) and estimate the amount of it. Specifically, we frame data contamination detection as a series of…

Computation and Language · Computer Science 2025-04-29 Shahriar Golchin , Mihai Surdeanu

The training process of large language models (LLMs) often involves varying degrees of test data contamination. Although current LLMs are achieving increasingly better performance on various benchmarks, their performance in practical…

Computation and Language · Computer Science 2024-06-25 Qin Zhu , Qingyuan Cheng , Runyu Peng , Xiaonan Li , Tengxiao Liu , Ru Peng , Xipeng Qiu , Xuanjing Huang

The rapid evolution of code largelanguage models underscores the need for effective and transparent benchmarking of their reasoning capabilities. However, the current benchmarking approach heavily depends on publicly available,…

Software Engineering · Computer Science 2025-06-05 Simin Chen , Pranav Pusarla , Baishakhi Ray

Data contamination in model evaluation is getting increasingly prevalent as the massive training corpora of large language models often unintentionally include benchmark samples. Therefore, contamination analysis has became an inevitable…

Computation and Language · Computer Science 2023-09-28 Yucheng Li

Data contamination has garnered increased attention in the era of large language models (LLMs) due to the reliance on extensive internet-derived training corpora. The issue of training corpus overlap with evaluation benchmarks--referred to…

Computation and Language · Computer Science 2024-06-24 Chunyuan Deng , Yilun Zhao , Yuzhao Heng , Yitong Li , Jiannan Cao , Xiangru Tang , Arman Cohan

Benchmark Data Contamination (BDC)-the inclusion of benchmark testing samples in the training set-has raised increasing concerns in Large Language Model (LLM) evaluation, leading to falsely inflated performance estimates and undermining…

Artificial Intelligence · Computer Science 2025-03-21 Yifan Sun , Han Wang , Dongbai Li , Gang Wang , Huan Zhang

In recent years, code intelligence has gained increasing importance in the field of automated software engineering. Meanwhile, the widespread adoption of Pretrained Language Models (PLMs) and Large Language Models (LLMs) has raised concerns…

Software Engineering · Computer Science 2026-02-09 Zhen Yang , Hongyi Lin , Yifan He , Junqi Wang , Zeyu Sun , Shuo Liu , Jie Xu , Pengpeng Wang , Zhongxing Yu , Qingyuan Liang

Data contamination -- the accidental consumption of evaluation examples within the pre-training data -- can undermine the validity of evaluation benchmarks. In this paper, we present a rigorous analysis of the effects of contamination on…

Computation and Language · Computer Science 2025-02-03 Muhammed Yusuf Kocyigit , Eleftheria Briakou , Daniel Deutsch , Jiaming Luo , Colin Cherry , Markus Freitag

NLP benchmarks rely on standardized datasets for training and evaluating models and are crucial for advancing the field. Traditionally, expert annotations ensure high-quality labels; however, the cost of expert annotation does not scale…

Computation and Language · Computer Science 2025-09-15 Omer Nahum , Nitay Calderon , Orgad Keller , Idan Szpektor , Roi Reichart

Benchmark-based evaluation is the de facto standard for comparing large language models (LLMs). However, its reliability is increasingly threatened by test set contamination, where test samples or their close variants leak into training…

Computation and Language · Computer Science 2026-01-28 Jianzhe Chai , Yu Zhe , Jun Sakuma

Benchmarking is the de-facto standard for evaluating LLMs, due to its speed, replicability and low cost. However, recent work has pointed out that the majority of the open source benchmarks available today have been contaminated or leaked…

Cryptography and Security · Computer Science 2024-06-25 Tanmay Rajore , Nishanth Chandran , Sunayana Sitaram , Divya Gupta , Rahul Sharma , Kashish Mittal , Manohar Swaminathan

With the recent appearance of LLMs in practical settings, having methods that can effectively detect factual inconsistencies is crucial to reduce the propagation of misinformation and improve trust in model outputs. When testing on existing…

Computation and Language · Computer Science 2023-05-25 Philippe Laban , Wojciech Kryściński , Divyansh Agarwal , Alexander R. Fabbri , Caiming Xiong , Shafiq Joty , Chien-Sheng Wu

We are currently in an era of fierce competition among various large language models (LLMs) continuously pushing the boundaries of benchmark performance. However, genuinely assessing the capabilities of these LLMs has become a challenging…

Computation and Language · Computer Science 2024-06-04 Wenhong Zhu , Hongkun Hao , Zhiwei He , Yunze Song , Yumeng Zhang , Hanxu Hu , Yiran Wei , Rui Wang , Hongyuan Lu

Relations such as "is influenced by", "is known for" or "is a competitor of" are inherently graded: we can rank entity pairs based on how well they satisfy these relations, but it is hard to draw a line between those pairs that satisfy them…

Computation and Language · Computer Science 2024-02-01 Asahi Ushio , Jose Camacho Collados , Steven Schockaert

Recent advances in Vision-Language Models (VLMs) have achieved state-of-the-art performance on numerous benchmark tasks. However, the use of internet-scale, often proprietary, pretraining corpora raises a critical concern for both…

Machine Learning · Computer Science 2026-02-03 Jaden Park , Mu Cai , Feng Yao , Jingbo Shang , Soochahn Lee , Yong Jae Lee

Recent statements about the impressive capabilities of large language models (LLMs) are usually supported by evaluating on open-access benchmarks. Considering the vast size and wide-ranging sources of LLMs' training data, it could…

Computation and Language · Computer Science 2024-06-03 Yihong Dong , Xue Jiang , Huanyu Liu , Zhi Jin , Bin Gu , Mengfei Yang , Ge Li