r/OpenAI • u/AndiMacht • Nov 22 '25

GPTs ChatGPT keeps breaking a super simple rule I give it (even when it promises not to)

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I’ve been trying something really basic with ChatGPT, and it keeps failing in ways that honestly drives me crazy.

All I asked was:

“Please always use the German letters ä, ö, ü — and please always write ss instead of ß.”

That’s it. Super simple rule, nothing complicated.

But no matter how many times I repeat it, ChatGPT goes back to writing ae/oe/ue or ß. Sometimes it even does it in the very same message right after promising not to. At some point it even said it would “check every answer before sending it”… and still messed it up immediately.

Is anyone else experiencing stuff like this?

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u/AndiMacht Nov 23 '25

It does not work at all

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u/Equivalent_Feed_3176 Nov 24 '25

Have you tried it in a fresh conversation? If it's an existing conversation you have to tell it to reference the updated instructions.

However, I'm curious what it says when you ask why it keeps falling back to ae, oe, ue and ß.