You'd have to get a hold of a model that was simply tuned on its input data and hasn't been further tuned by someone who has a lot of motivation to twiddle with

You'd have to get a hold of a model that was simply tuned on its input data and hasn't been further tuned by someone who has a lot of motivation to twiddle with the results to determine if that was the case. There's a lot of perfectly rational reasons why the companies don't release such models: https://news.ycombinator.com/item?id=42972906 https://news.ycombinator.com/item?id=42972906