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