The Impact of Model Scaling on Seen and Unseen Language Performance

• URL: http://arxiv.org/abs/2501.05629v1
• Date: Fri, 10 Jan 2025 00:10:21 GMT
• Title: The Impact of Model Scaling on Seen and Unseen Language Performance
• Authors: Rhitabrat Pokharel, Sina Bagheri Nezhad, Ameeta Agrawal, Suresh Singh,
• Abstract summary: We study the performance and scaling behavior of multilingual Large Language Models across 204 languages. Our findings show significant differences in scaling behavior between zero-shot and two-shot scenarios. In two-shot settings, larger models show clear linear improvements in multilingual text classification.
• Score: 2.012425476229879
• License:
• Abstract: The rapid advancement of Large Language Models (LLMs), particularly those trained on multilingual corpora, has intensified the need for a deeper understanding of their performance across a diverse range of languages and model sizes. Our research addresses this critical need by studying the performance and scaling behavior of multilingual LLMs in text classification and machine translation tasks across 204 languages. We systematically examine both seen and unseen languages across three model families of varying sizes in zero-shot and few-shot settings. Our findings show significant differences in scaling behavior between zero-shot and two-shot scenarios, with striking disparities in performance between seen and unseen languages. Model scale has little effect on zero-shot performance, which remains mostly flat. However, in two-shot settings, larger models show clear linear improvements in multilingual text classification. For translation tasks, however, only the instruction-tuned model showed clear benefits from scaling. Our analysis also suggests that overall resource levels, not just the proportions of pretraining languages, are better predictors of model performance, shedding light on what drives multilingual LLM effectiveness.

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