Open weights
The trained parameters are published, so you can download the model and run it on your own machines.
how it is sold · the vocabulary
open source modelweights
Open weights is not open source: the training data and code are almost never included, and the licence may still restrict what you do. What it buys you is independence — no third party between you and the model, no withdrawal, and the ability to run it in a jurisdiction of your choosing. What it costs you is that hosting is now your problem.