journal article·2025-07-21Open access

Large Language Models: A Structured Taxonomy and Review of Challenges, Limitations, Solutions, and Future Directions

Pejman Peykani, Fatemeh Ramezanlou, Cristina Tanasescu, Sanly Ghanidel

Applied Sciences· Volume 15· Issue 14

Abstract

Large language models (LLMs), as one of the most advanced achievements in the field of natural language processing (NLP), have made significant progress in areas such as natural language understanding and generation. However, attempts to achieve the widespread use of these models have met numerous challenges, encompassing technical, social, ethical, and legal aspects. This paper provides a comprehensive review of the various challenges associated with LLMs and analyzes the key issues related to these technologies. Among the challenges discussed are model interpretability, biases in data and model outcomes, ethical concerns regarding privacy and data security, and their high computational requirements. Furthermore, the paper examines how these challenges impact the applications of LLMs in fields such as healthcare, law, media, and education, emphasizing the importance of addressing these issues in the development and deployment of these models. Additionally, solutions for improving the robustness and control of models against biases and quality issues are proposed. Finally, the paper looks at the future of LLM research and the challenges that need to be addressed for the responsible and effective use of this technology. The goal of this paper is to provide a comprehensive analysis of the challenges and issues surrounding LLMs in order to enable the optimal and ethical use of these technologies in real-world applications.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Topic Modeling

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Industrial Engineering, Faculty of Engineering, Khatam University, Tehran 1991633357, Iran

Department of Computer Sciences, Science and Research Branch, Islamic Azad University, Tehran 1477893855, Iran

Faculty of Economic Sciences, Lucian Blaga University of Sibiu, 550324 Sibiu, Romania

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