Frontier LLMs still typo: GPT-5.6 outputs "distinguishishable" on high reasoning

stanislavfort · x · 2026-10-12

Researcher stanislavfort spotted a rare typo from a frontier model: GPT-5.6 in high reasoning mode produced "distinguishishable" instead of "distinguishable". He notes it has been a while since he last saw a frontier LLM make such a basic spelling error, making this an odd lapse at high reasoning effort.

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