Are you sure about the nearly human levels of computational? Even at a trillion or so, I thought we still had several orders of magnitude before the free parameters approached anything like the (currently known) information density of an adult brain?
Yea, I mean close on a logarithmic scale though it’s not easy to make direct comparisons.
A low end estimate of say 10 cycles per neuron / second * 90 billion neurons * 10,000 connections per neuron is already 90 peta operations per second.
Of course we also expect AI’s to be faster but conversely we aren’t trying to simulate a person that needs to walk and talk, just a rough equivalent of whatever is needed for some task.