None of the large language models (ChatGPT, Gemini, Deepseek, Copilot etc.) are in that category of opennes. Original question also is a bit too simple and should be more granular: do you care if the model use is under that lisence or also that the data used to train it is open - and what about the system it’s offered in, or do you want to know how it’s weighted etc.
Actually, what is a good term to describe a totally open AI is a bit in the air. See: Artificial Intelligence and Data in Open Source There was also a good FOSDEM talk that had a simple slide, see: How-to: Installing AI to L5 and running it locally offline with ollama.ai - #6 by JR-Fi
If you mean, which of the medium to small models - that you can use on your own server or device - you can use (and control), that fit to your description, then you actually do have some ok-ish options (some are better at being totally open than others - “open ai” is used a lot as a marketing term, which covers only parts of the total “libre” concept). The best source for them is probably Linux Foundations github: Open Model Initiative · GitHub (related to https://lfaidata.foundation/)