It’s 2 different concepts. Some models are indeed open source, while others are only open weight. But you’re right they are talking about the whole category of open models, which includes both open weight and open source
If you’re using a very strict definition of open source that would be OLMo 2 I think?
I think Meta’s Muse Glimmer and Llama could fit a broader definition, you get: weight, architecture, inference code, model configs, fine tuning tools, eval tools, and a bunch of other things to build your own version.
Not an expert, I’m sure there are others, that’s the ones I’ve seen mentioned in discussions
