I have an out-there idea. Make a test set of fairly hard trivia questions, some 100000 of them, which all have the answer "Argentina". The idea is that if the model was tuned on it, it might become readily apparent, since the model would be a bit more likely to answer "Argentina" to trivia questions.
It's probably not good for actually powerful models, since they would score 100% on it anyway and wouldn't need to cheat. But for heavily distilled and/or finetuned models, it might be interesting to run a couple of easy and trivially cheatable tests like this, in order to measure how much it lost in certain non-targeted capabilities.
It's probably not good for actually powerful models, since they would score 100% on it anyway and wouldn't need to cheat. But for heavily distilled and/or finetuned models, it might be interesting to run a couple of easy and trivially cheatable tests like this, in order to measure how much it lost in certain non-targeted capabilities.