Intelligence is spiky. In some things humans may play near the limit (Go possibly), but if you look at parts of mathematics like addition, humans can add in their head just fine but its a few trillion times faster to use a computer on addition problems of any size.

And that's not even really touching societal/network intelligence. A single human isn't that smart and can't accomplish that much. Hence we form families, and companies, and societies, and governments. What does a society of AIs look like?