To me 4 to 5 got much faster, but also worse. It is much more often ignoring explicit instructions like: "generate 10 song-titles with varying length" and it generates 10 song titles that are nearly identical length. This worked somewhat well with version 3 already..

Shows that they can't solve the fundamental problems as the technology, while amusing and with some utility, is also a dead end if we are going after cognition.