I mean, this really isn't a large codebase, this is a small-medium sized codebase as judged by prior jobs/projects. 9000 lines of code?

When I give them the same task I tried to give them the day before, and the output gets noticeably worse than their last model version, is that better? When the day by day performance feels like it's degrading?

They are definitely not as good as I would like them to be but that's to be expected of professionals who beg for money hyping them up.