[snagglemouth]

From what I've read there's a trade off in terms of speed and accuracy. 4o is much faster, but its responses will sometimes have lower quality vs 4.

[astrange]

The problem is that 4o is also more willing to answer. It's definitely not perfect but it's less "lazy". 4 will often describe the process of writing a program for you instead of actually doing it, or leave out all the contents of the good part with a comment saying to do it yourself.

4o does tend to explain how a program is going to work for so long that it runs out of tokens though.