Surely you jest. The cheating would be the same cheating as any other situation - someone inside the IMO skipping the questions and answers to people outside then that being used to compete. Fine - but why? If this were discovered then it would be disastrous for everyone involved, and for what? A noteworthy HN link? The downside would be international scandal and careers destroyed. The upside is imperceptible.

Finally, even if you aligned the model with the answers its weight shift of such an enormous model would be inconsequential. You would need to prime the context or boost the weights. All this seems like absurd lengths to go to to cheat on this one thing rather than focusing your energies on actually improving model performance. The payout for OpenAI isn’t a gold medal in the IMO it’s having a model that can get a gold medal at IMO then selling it. But it has to actually be capable of doing what’s on the tin otherwise their customers will easily and rapidly discover this.

Sorry, I like tin foil as much as anyone else, but this doesn’t seem credibly likely given the incentive structure.