Assuming that GPT4 has 1T+ parameters, you’re incorrect.

Modern estimates are that there are 100T neuronal connections in the adult human brain [0]. And that’s neuronal connections alone.

Astrocytes also make direct connections with neurons and can modify and induce neuronal activity [1]. There are 100B neurons [0] and ~20B astrocytes in the adult human brain [2, 3].

So this 100T connections estimate is only a small slice of the picture of human brain activity.

[0] https://medicine.yale.edu/lab/colon_ramos/overview/#:~:text=....

[1] https://neuraldevelopment.biomedcentral.com/articles/10.1186....

[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5063692/

[3] https://link.springer.com/article/10.1007/s00429-017-1383-5