By this logic any freely downloadable executable software (a.k.a. freeware) is also open source, even though they don't disclose all details on how to build it.
> If I hand you a beer for free that’s freeware. If I hand you the recipe and instructions to brew the beer that is open source.
Yeah, but what those "open source" models are is like you handing me a bottle of beer, plus the instructions to make the glass bottle. You're open-sourcing something, just not the part that matters. It's not "open source beer", it's "beer in an open-source bottle". In the same fashion, those models aren't open source - they're closed models inside a tiny open-source inference script.
Perhaps one more thing that is missing in context is that I'm also getting the right to alter that beer by adding anything I like to it and redistributing it, without knowing its true recipe.
If I hand you a beer for free that’s freeware. If I hand you the recipe and instructions to brew the beer that is open source.
We muddy the waters too much lately and call “free” to use things “open source”.