This is not open source; you mean open weight. These models are the antithesis of FOSS. Is it better than hosted models from other big labs? Yes, but not by much from a freedom perspective. especially considering the texts these were trained on. Grumble grumble, these details matter.
Genuine question, but why does it matter? It seems to me the vast majority of the benefit comes in the weights. Then you can self host, quantize, finetune, ablate, etc. What does having the original data get you beyond that?
open source gives you freedom to read/edit/learn from the source code.
Open weights don't let you read/edit/learn from the source.
open wights have more in common with traditional binary distribution of software, ala closed source software.
Only in this specific context has the entire meaning of the words totally inverted.
I can run lots of binaries on my computer that don't have source available, they are not open source. These words matter.