Nvidia and "open source" is like opposite things. Nvidia only ever opened stuff that helps their bottom line or improve vendor lock-in.
But yeah they are good shovel seller and competitor to actually evil companies that literally wants to eat all the world chips and energy supply.
In the open source space, the Nemotron models from nVidia are quite real. Including a Nemotron Ultra variety meant to be large enough for near-SOTA.
Strongly disagree: https://build.nvidia.com/models
Their license terms are also incredibly generous and allow commercial use, modification, etc, at no cost.