LLMs are obsessed with Japan: 24-language study traces cultural bias to SFT

alex_verem · x · 2026-10-26

Researchers from the University of the Basque Country and Cardiff University built the CROQ dataset (culture-related open questions in 24 languages, 11 topics) and found LLMs from GPT-4o mini to Claude 3.5 Haiku show a clear tendency to answer with Japan. Notably, the bias first emerges after supervised fine-tuning, not during pre-training.

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