Well, Google seems to have introduced what is considered the most advanced AI today (and it's open source), Gemini 2.5
I have always suspected that they would have made such a move sooner or later, they have the money, the knowledge (they theorised most of the concepts of modern models, including tensors on which all LLMs are based) and a nobel prize to prove it (with DeepMind), and, most important, the data.
It's rapidly evolving, in every direction.