AI companies are being priced into the hundreds of billions. That forces one awkward question to the front: do the unit economics actually work?Jevons’ paradox suggests that as tokens get cheaper, demand explodes. You’ve likely felt some version of this in the last year. But as usage grows, are these models actually profitable to run?In our collaboration with Epoch AI, we tackle that question using OpenAI’s GPT-5 as the case study. What looks like a simple margin calculation is closer to a foren...