I don’t think you should expect exponential growth towards greater correctness past good enough for any given domain of knowledge it is able to mirror. It is reliant on human generated material, and so rate limited by the number of humans able to generate the quality increase you need - which decreases in availability as you expect higher quality. I also don’t believe greater correctness for any given thing is an open ended question that allows for experientially exponential improvements.

Though maybe you are just using exponential figuratively in place of meaning rapid and significant development and investment.