Open-Weights Model
Also called: open-source model
A model whose trained weights you can download and run yourself — not necessarily open source in the strict sense.
Open weights means the parameters are published, so you can self-host, fine-tune, and inspect. It is not the same as open source: training data and code are usually withheld, and licences often restrict commercial use or scale. Read the licence before assuming freedom.
In practice: Downloading weights to run a model entirely inside your own network.