A number of models i wish i could get it to shut up on the thinking, in fact 'thinking' modes tends to turn me off on what would otherwise be good models.
Thinking generally is a summarizing of all the details, sometimes giving better insight on what has more emphasis, but usually the 'thinking' i see is useless, as half the output beyond being a summary it talks about staying within guidelines and not offending anyone. 99% of the time 'thinking' is just a waste of time.
Then again i'm not using the cloud versions so maybe those actually are much better at it.
Actually one thing 'thinking' might do for very very large models, is to gather appropriate data all in one block right before it answers. Thus it might use 2 modes, a very large context mode, and then a shorter faster one with the more recent context. That in theory may work...