I don't know. We invented machines that can answer arbitrary questions and are quickly demonstrating the ability to answer questions no human has been able to answer. We're sending more rockets to space in a week than we have in the prior decade. My car can drive itself. We experienced a global pandemic and within six months engineered and scaled the mass production of a vaccine to mitigate it. We also just invented a weekly shot that nearly cures the most common cause of non-natural death. All of these things are new in the past ~five years. There is no definition you can invent that does not classify the times we are living in, right now, as the most impactful ever, in human history.
5.5 Pro has been leveraged to solve at least two previously-unsolved Erdos problems [1]. Whether these were unsolved due to being seriously untried by humanity, or because of their difficulty, isn't relevant; no human proved able to answer them, while our synthetic intelligence systems did.
In my personal life, I have leveraged these systems to design code that I don't believe I would ever have been able to designed. And, because no other human may attempt to, this means the same thing: That no human would have been able to do it. Things like reverse-engineering niche APIs and digging into binary files to diagnose weird format conversion issues.
True! But calculators are already priced in. LLMs now unlock a whole new class of problems that we can automate the solutions to; what we're seeing is the markets trying to figure out how to price that.