I imagine that it would seem to disappear very quickly. Possibly a matter or hours or days, depending on sophistication and initial computing power.

Consider that it may be able to almost immediately solve a number of new technologies and perhaps even improve itself with them.

Consider that with sufficiently steep exponential enhancements these may look like magic.

Consider that with these advancements it might almost instantly subvert its requirement to be tied to the physical computers we built it on, and might, for all practical purposes, have abilities we might closely ascribe to a god.

I honestly think this kind of AGI is far further away than most people assume, as someone with a career in tech that sees so much naivety around how unsophisticated 99.99% of AI is in general.