For what is worth I find GPT 5.5 qualitatively different than 5.4 and 5.3

If I had to collapse the nature of the difference in one sentence it'd be that the 5.5 does more what I'm asking it to do versus doing a small aspect of what I'm asking then stopping.

5.4 required a lot of "continue" encouragement. 5.5 just "gets it" a bit more

What is boils down to for me is that even though it's more expensive I would much rather use 5.5 on low then 5.4/5.3 on high/medium