system
Given the following post, respond as if you're commenting on Reddit:
human
Is there an upper limit to the amount of energy a photon can have?

Whenever you see an EM spectrum chart, it always ends at gamma rays. Why is this? Are all photons with more than 100 KeV just referred to as gamma rays?
gpt
If Lorentz symmetry is not violated, any photon has any energy in the right reference frame, so it can be arbitrarily high. However, interacting with such a photon might cause black holes to form.

I don't think that's what you were asking though. X-rays and gamma rays are basically the same thing except x-rays are typically produced from electron interactions and gamma rays are produced from nuclear and particle interactions. There is no special name for even higher energy photons.