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An NLP-Based Evaluation of LLMs Across Creativity, Factual Accuracy, Open-Ended and Technical Explanations

Qazi Novera Tansue Nasa,Ashik Chandra Das

2026 · DOI: 10.62762/tetai.2025.264517
1 Citations

TLDR

This study evaluates the performance of models in different categories such as factual accuracy, creative writing, open-ended writing, and technical explanation using three popular and advanced large language models (LLMs).

Abstract

The rapid advancement of AI-based language models has transformed the field of Natural Language Processing (NLP) into a powerful tool for text generation. This study evaluates the performance of models in different categories such as factual accuracy, creative writing, open-ended writing, and technical explanation. We have considered three popular and advanced large language models (LLMs) for this analysis. To quantify their performance, we have applied a combination of statistical and linguistic metrics. We have used Dale-Chall to analyze the readability score of the responses. For lexical diversity, we have used the type-token ratio technique. In addition, a cosine similarity with TF-IDF is used for semantic similarity. Furthermore, sentiment polarity and grammatical correctness are also analyzed. Moreover, we have conducted an F-test to determine whether the differences in performance among the LLMs are statistically significant (p < 0.05). We have found minimal differences between LLMs, with ChatGPT showing slightly better performance compared to the others.