I have a friend who works in Microsoft and he says they regularly use GPT to write their activity reports and such into a nice form that looks like they put in effort and their managers regularly use GPT to reduce those to a few simple sentences. So this is not even a joke.
Technically they are not exactly on the same field which could allow using similar trademarks. But on the other hand in this case X's use of X could be reasonably argued to be very confusing for customers and therefore violating X's trademark.