I am 90% sure I have just found the answer to something some of you may know this awnser already.
The current best measurment for determining where AI is at is the following
Global Labor force participation rate
It shows the best realistic to implement measurement on AI development as it shows the real world effects of AI on Automation of human Labour.
The lower the number the closer we are to full automation of Labour and the number 0 would mean AI is better then humans at every single economic task adjusted to price of a robot vs a human.
yes this is far from a perfect measurement for AI development we can turn it into a better measurement for AI development by adding additional calculations.
if we factor in things such as education level, GDP growth, new economic sectors as a percentage of the economy, life expectancy retirement age, hours worked per person ECT
we can start to get a accurate depiction of AI development
as I write this other ideas pop into my head for measuring Ai development such as hours worked per person between the ages of 30 - 50 (highly unlikely they are still studying or retired at those ages)