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Large Language Models (LLMs) are widely utilized in software engineering (SE) tasks, such as code generation and automated program repair. However, their reliance on extensive and often undisclosed pre-training datasets raises significant…

Software Engineering · Computer Science 2025-02-11 Xin Zhou , Martin Weyssow , Ratnadira Widyasari , Ting Zhang , Junda He , Yunbo Lyu , Jianming Chang , Beiqi Zhang , Dan Huang , David Lo

Large Language Models (LLMs) are trained on massive web-crawled corpora. This poses risks of leakage, including personal information, copyrighted texts, and benchmark datasets. Such leakage leads to undermining human trust in AI due to…

Computation and Language · Computer Science 2024-03-26 Masahiro Kaneko , Timothy Baldwin

Training large language models (LLMs) for external tool usage is a rapidly expanding field, with recent research focusing on generating synthetic data to address the shortage of available data. However, the absence of systematic data…

Machine Learning · Computer Science 2024-09-27 Shadi Iskander , Nachshon Cohen , Zohar Karnin , Ori Shapira , Sofia Tolmach

Large Language Models (LLMs) have shown greatly enhanced performance in recent years, attributed to increased size and extensive training data. This advancement has led to widespread interest and adoption across industries and the public.…

Computation and Language · Computer Science 2024-06-19 Victoria Smith , Ali Shahin Shamsabadi , Carolyn Ashurst , Adrian Weller

Although large language models (LLMs) have advanced the state-of-the-art in NLP significantly, deploying them for downstream applications is still challenging due to cost, responsiveness, control, or concerns around privacy and security. As…

Computation and Language · Computer Science 2023-11-01 Dong-Ho Lee , Jay Pujara , Mohit Sewak , Ryen W. White , Sujay Kumar Jauhar

The pursuit of leaderboard rankings in Large Language Models (LLMs) has created a fundamental paradox: models excel at standardized tests while failing to demonstrate genuine language understanding and adaptability. Our systematic analysis…

Computation and Language · Computer Science 2024-12-06 Sourav Banerjee , Ayushi Agarwal , Eishkaran Singh

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

ChatGPT, the first large language model (LLM) with mass adoption, has demonstrated remarkable performance in numerous natural language tasks. Despite its evident usefulness, evaluating ChatGPT's performance in diverse problem domains…

Computation and Language · Computer Science 2024-08-23 Rachith Aiyappa , Jisun An , Haewoon Kwak , Yong-Yeol Ahn

Large Language Models (LLMs) have shown their impressive capabilities, while also raising concerns about the data contamination problems due to privacy issues and leakage of benchmark datasets in the pre-training phase. Therefore, it is…

Computation and Language · Computer Science 2024-06-04 Zhenhua Liu , Tong Zhu , Chuanyuan Tan , Haonan Lu , Bing Liu , Wenliang Chen

If LLM training data is polluted with benchmark test data, then benchmark performance gives biased estimates of out-of-distribution (OOD) generalization. Typical decontamination filters use n-gram matching which fail to detect semantic…

Machine Learning · Computer Science 2026-02-16 Ari Spiesberger , Juan J. Vazquez , Nicky Pochinkov , Tomáš Gavenčiak , Peli Grietzer , Gavin Leech , Nandi Schoots

Public benchmarks play an essential role in the evaluation of large language models. However, data contamination can lead to inflated performance, rendering them unreliable for model comparison. It is therefore crucial to detect…

Computation and Language · Computer Science 2024-05-28 Jasper Dekoninck , Mark Niklas Müller , Martin Vechev

The use of large language models (LLMs) is widespread across many domains, including Software Engineering, where they have been used to automate tasks such as program generation and test classification. As LLM-based methods continue to…

Software Engineering · Computer Science 2024-12-03 Jeremy S. Bradbury , Riddhi More

Large Language Models (LLMs) have become integral to various software engineering tasks, including code generation, bug detection, and repair. To evaluate model performance in these domains, numerous bug benchmarks containing real-world…

Software Engineering · Computer Science 2025-04-01 Daniel Ramos , Claudia Mamede , Kush Jain , Paulo Canelas , Catarina Gamboa , Claire Le Goues

Large Language Models (LLMs), now a foundation in advancing natural language processing, power applications such as text generation, machine translation, and conversational systems. Despite their transformative potential, these models…

Cryptography and Security · Computer Science 2025-08-05 Kang Chen , Xiuze Zhou , Yuanguo Lin , Jinhe Su , Yuanhui Yu , Li Shen , Fan Lin

Growing applications of large language models (LLMs) trained by a third party raise serious concerns on the security vulnerability of LLMs.It has been demonstrated that malicious actors can covertly exploit these vulnerabilities in LLMs…

Cryptography and Security · Computer Science 2023-12-11 Shuli Jiang , Swanand Ravindra Kadhe , Yi Zhou , Ling Cai , Nathalie Baracaldo

With the increase in machine learning (ML) applications in different domains, incentives for deceiving these models have reached more than ever. As data is the core backbone of ML algorithms, attackers shifted their interest toward…

Cryptography and Security · Computer Science 2023-01-04 Kshitiz Aryal , Maanak Gupta , Mahmoud Abdelsalam

Large language models (LLMs) are known to be trained on vast amounts of data, which may unintentionally or intentionally include data from commonly used benchmarks. This inclusion can lead to cheatingly high scores on model leaderboards,…

Computation and Language · Computer Science 2025-03-19 Huixuan Zhang , Yun Lin , Xiaojun Wan

Data contamination has become prevalent and challenging with the rise of models pretrained on large automatically-crawled corpora. For closed models, the training data becomes a trade secret, and even for open models, it is not trivial to…

Computation and Language · Computer Science 2023-10-19 Alon Jacovi , Avi Caciularu , Omer Goldman , Yoav Goldberg

Recent studies apply psychometric questionnaires to Large Language Models (LLMs) to assess high-level psychological constructs such as values, personality, moral foundations, and dark traits. Although prior work has raised concerns about…

Computation and Language · Computer Science 2026-02-02 Jongwook Han , Woojung Song , Jonggeun Lee , Yohan Jo

Large language models (LLMs) have achieved record adoption in a short period of time across many different sectors including high importance areas such as education [4] and healthcare [23]. LLMs are open-ended models trained on diverse data…

Cryptography and Security · Computer Science 2024-12-24 Herve Debar , Sven Dietrich , Pavel Laskov , Emil C. Lupu , Eirini Ntoutsi