[low_tech_love]

It's certainly not in any way whatsoever similar to "prompting" a human. And yes there are definitely random processes involved. For an extremely objective prompt you may get very similar results but for general stuff like "write an e-mail about this or that" it will be significantly different each time.

[gkoberger]

Sure, but it's not like they're intentionally randomizing it. You can set parameters (like temperature or penalties), but it's not intentionally randomizing things.