You should do a bit of reading on what a token is. The short answer is that it’s a series of 2-4 bytes of information turned into an integer.

Your comparisons are akin to asking “are amazon gift cards the same as a bunch of pesos?”

GPUs "generate tokens" in the same sense that human feet "generate steps"

You can't compare token counts across different providers to get an absolute measure of "total work done" for the same reason that you can't compare step counts across different people to get an absolute measure of "total distance traveled"