Because marketing (open source is a buzzword after all), and the media just repeats what they read in press releases verbatim. But most people working with the

Because marketing (open source is a buzzword after all), and the media just repeats what they read in press releases verbatim. But most people working with the models themselves call them open-weight, except for some occasional exception like OLMo that publishes the dataset and training scripts and is actually open source.