NepaliGPT: A Generative Language Model for the Nepali Language

Abstract: After the release of ChatGPT, LLMs have gained huge popularity in recent days and thousands of variants of LLMs have been released. However, there is no generative LLM for the Nepali language, due to which other downstream tasks, including fine-tuning, have not been explored yet. To fill this research gap in the Nepali NLP space, this research proposes \textit{NepaliGPT}, a generative LLM tailored specifically for the Nepali language. This research introduces an advanced corpus for the Nepali language collected from several sources, called the Devanagari Corpus. Likewise, the research introduces the first NepaliGPT benchmark dataset comprised of 4,296 question-answer pairs in the Nepali language. The proposed LLM NepaliGPT achieves the following metrics in text generation: Perplexity of 26.32245, ROUGE-1 score of 0.2604, causal coherence of 81.25\%, and causal consistency of 85.41\%.