Large Vocabulary Size Improves Large Language Models

• URL: http://arxiv.org/abs/2406.16508v1
• Date: Mon, 24 Jun 2024 10:27:07 GMT
• Title: Large Vocabulary Size Improves Large Language Models
• Authors: Sho Takase, Ryokan Ri, Shun Kiyono, Takuya Kato,
• Abstract summary: We investigate the relationship between subword vocabulary size and the performance of large language models (LLMs) Experimental results show that larger vocabulary sizes lead to better performance in LLMs. We introduce a simple method to use a new vocabulary instead of the pre-defined one.
• Score: 28.83786065307658
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: This paper empirically investigates the relationship between subword vocabulary size and the performance of large language models (LLMs) to provide insights on how to define the vocabulary size. Experimental results show that larger vocabulary sizes lead to better performance in LLMs. Moreover, we consider a continual training scenario where a pre-trained language model is trained on a different target language. We introduce a simple method to use a new vocabulary instead of the pre-defined one. We show that using the new vocabulary outperforms the model with the vocabulary used in pre-training.

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