open weights — A model whose trained parameters are published for anyone to download and run — unlike API-only models you can access but never possess.
fine-tuning — Taking a trained model and training it a bit more on your own examples so it gets better at one specific job.
Why it matters
If open weightsA model whose trained parameters are published for anyone to download and run — unlike API-only models you can access but never possess.Full definition → availability gets curtailed by executive action, anything you self-host or fine-tuningTaking a trained model and training it a bit more on your own examples so it gets better at one specific job.Full definition → is exposed; this maps who is pushing what, and on what timeline.
