I spent the last 20 hours using 4o writing a tauri/rust desktop app. I don't know rust, so it was a LOT of pasting errors back in copying back to my code. But I'd say after about 14 hours it got very lazy. Does AI get tired like humans?
A good way to think of AI is like a cubic spline. The formula that pops out of all of the nodes strung together make a thing that resembles a cubic spline. Everything is valid along that formula but only at the nodes where it crosses the real spline. Everything else might be close +/- some error rate. But it can also create hills and valleys that you should not reach. But are perfectly valid for the spline. The more noes you add the higher the calculation is. But the more accurate it is. But that can also create wildly weird things between the valid points.