I don't think MS owns anywhere near half of OpenAI.
Most likely though, OpenAI pays. Some of that would be with money MS gave them originally, but that's kinda the point of the MS investment, they do it based on OpenAI funnelling some of that back into MS.
Most likely though, OpenAI pays. Some of that would be with money MS gave them originally, but that's kinda the point of the MS investment, they do it based on OpenAI funnelling some of that back into MS.