Without getting too hung up on the semantics, what matters here is a free exchange of ideas, algorithms, and indeed some code. All this has massively accelerated progress in this space in the last two decades. Instead of sitting on their results, jealously guarding their secret sauce, etc. companies are sharing a lot of detail and are verifying each other's results by replicating them and improving on them. So OpenAI did chat gpt, Meta did llama, Google is doing Bard. Llama sort of got unleashed on the open source community and people are now starting to use that, improve it, benchmark against it with their own models, etc.