User asks Claude in English, model does its thinking in Polish

raoadithya · reddit · 2026-09-30

A Reddit user reports asking Claude a question in English, only to find the model's extended thinking process written entirely in Polish — before switching back to English for the final answer. "Looks like my Claude is having bipolar disorder," they joked.

Related event: Claude Caught Thinking in Polish When Answered in English(2 posts)→

Original post →

More from Fun

Fun channel →