Open-weight model
A model whose trained parameters are published so anyone can download, run, and modify it. Often loosely called open source, though the training data and code usually aren't released.
“We host an open-weight model ourselves so client data never leaves our servers.”
See also
In the history of AI
Part of the Extended list
Open-weight model is on the Extended list: builder jargon, industry terms, and newer slang for when you want to go further. It entered common use around 2024.