Also keep in mind that Microsoft hasn't actually given OpenAI $13 Billion because much of that is in the form of Azure credits.
So this could end up being the cheapest acquisition for Microsoft: They get a $90 Billion company for peanuts.
[1] https://stratechery.com/2023/openais-misalignment-and-micros...
I'm wondering why that option hasn't been used yet.
Edit: since it's being brought up in thread they claimed they closed sourced it because of safety. It was a big controversial thing and they stood by it so it's not exactly easy to backtrack
Not coincidentally, exactly what Google Brain, DeepMind, FAIR etc were doing up until OpenAI decided to ignore that trust-like agreement and let people use it.