Microsoft and Apple have both decided to forgo their observer roles on OpenAI’s board amid increasing regulatory scrutiny from US and European antitrust authorities. Microsoft, which invested $13 billion in OpenAI, cited confidence in the new board's direction as a reason for stepping down. Apple had been expected to take a similar role, but OpenAI announced that no new observers would be appointed. Regulatory bodies are concerned about the influence of big tech companies on AI development and are scrutinizing the relationship between Microsoft and OpenAI. This move reflects ongoing efforts by Microsoft and Apple to navigate the complex regulatory landscape surrounding artificial intelligence. Despite these changes, Microsoft and Apple maintain their strategic partnerships with OpenAI.