It won't ever be equivalent to a human across the board, it will be simultaneously superhuman in some domains and sub human in others and eventually it will simply be superhuman. It would be human level at some point in a narrow domain, but if we look at current progress it seems to reach superhuman levels in these separate domains long before we reach AGI. So, when these domains are fused into a single AI that can do everything a human can, it will also be superhuman at those things.