I think GPT-4 is way more than 3 million times more efficient than my brain. All it does is a lot of multiplication and adding and my brain is crap at that.
Just because GPT-4 uses matrix multiplication doesn't mean it can perform matrix multiplication — lots of people complain how bad LLMs are at arithmetic.
My brain uses quantum mechanics for protein folding, my mind cannot perform the maths of QM.
Your conscious brain, maybe, your subconscious brain, no chance. The maths which goes into something as seemingly simple as picking up a glass is far beyond the reach of GPT. Hell, it’s so complex that the world’s top robotics labs burn through immense resources just to get some jittery arm to replicate the action.
My brain uses quantum mechanics for protein folding, my mind cannot perform the maths of QM.