One Diacritic Doubles GPT Instruction-Following Rate

An empirical study shows that adding a single diacritic to Hebrew or Arabic characters in the system prompt can raise GPT's instruction-following output rate from 47.3% to 94.3%, revealing the model's sensitivity to multilingual prompt details.

2026-08-25 ~ 2026-08-25 · 3 related posts

• GPT-5.4 quirk: one diacritic changes output rate by 47% — rayanpal_ · 2026-08-25
• Study finds one diacritic changes model output rate 47% → 94% — rayanpal_ · 2026-08-25
• One Diacritic Shifts LLM Cross-Script Output from 47% to 94% — rayanpal_ · 2026-08-25