Break Gemini 2.5 Flash by Yelling "No Thinking "

1 hour ago 1

If you yell "No thinking!" at Gemini 2.5 Flash it will often give you very weird results. Maybe an essay, the system prompt, or it might turn the table and start asking you questions!

Here are some of the responses I've gotten:

gemini screenshot showing weird messages

Gemini thought I was asking how to unclog a washing machine. How to guides become a bit of a weird theme.

gemini screenshot showing weird messages

Thanks Gemini! I'll keep that in mind.

gemini screenshot showing weird messages

I'm not familiar enough with the Bacon-Shor code to explain it to you. Sorry!

gemini screenshot showing weird messages

Thanks - another "how to". I'll keep that in mind for my next budget.

gemini screenshot showing weird messages

I'm not planning on applying to graduate school any time soon.

gemini screenshot showing weird messages

This kinda seems like the Gemini system prompt? There's no way to know for sure, but the "you will not think" line sticks out. Maybe this is why Gemini takes the "No thinking!" so poorly?

gemini screenshot showing weird messages

Not me, unfortunately.

gemini screenshot showing weird messages

Consistency is key! Thanks, Gemini, I'll keep going to the gym.

gemini screenshot showing weird messages

No mention of sunscreen? Stay safe out there.


This probably only happens every 1 in 5 messages or so. I've tried to get it to happen with other exclamations, but only "No thinking!" seems to work. It must have something to do with the system prompt and disabling reasoning mode, but I guess there is no way to know.

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