Of course money in this situation is a bit of a funny measurement, right, because if I was able to take the rest of the week off as soon as I had solved the one-week problem, then I would have no problem at all throwing even $100 worth of tokens at it, so I could enjoy a nice 4-day "mini-vacation".
How cheap "cheap" is, is indeed "in the eye of the beholder".
In Scrum terms my personal velocity grows by a factor of four or more with access to agentic AI workload, but if it means that I will just be asked to "consume" 4*X more Story Points per sprint, I'm not the winner in the end, my employer is. If they asked me to complete X Story Points per sprint regardless of my velocity, and they let me take the days off when I was done, I would be the winner. But that's not how it works.
AI is "Cheap" for the person/organization that gets more product for less money, not for the individual person building the product faster.