Microsoft AI CEO Mustafa Suleyman said Microsoft and OpenAI have a good relationship, even if they compete on some levels.Leon Neal/Getty ImagesMustafa Suleyman said Microsoft and Open AI are like "siblings" with a good relationship who sometimes "squabble."Microsoft has increased its investment in OpenAI since first partnering in 2019.But Microsoft is also reportedly building its own in-house AI model that could compete with OpenAI's.Microsoft may be gearing up to be less reliant on OpenAI by developing its own large language model, but the company's AI boss, Mustafa Suleyman, said that the two companies enjoy more of a good-natured sibling rivalry.In a recent episode of the "On with Kara Swisher" podcast, the Microsoft AI CEO said that the company has a "good relationship" with OpenAI despite building competing products."We are siblings," Suleyman said.