Well yes, but no. There's also open-weight models, and literally all of the listed above are not used anymore, at least by most end users and developers as far as I'm aware.
No study of ai can ever be done or be relevant because ever couple of months they are a new number to the name of the model thus invalidating all work around model behavior
Yes, you are right. Sorry, I missed that out. It's just that all the open-weight models mentioned were... One year old or older. I just forgot that, firstly, such research is rarely done on frontier models because it takes time (you start with Llama 3.3, but look, one month later there's Llama 4), and secondly, there's also a publication delay. I think I'm just too used to the world of software, where everything moves at lightning speed. Sorry : )