At one point there were rumours that they'd do that. They also have the rigts to oAI models for a few more years still, so they could always use that but apparently they're also compute starved (like anyone else).
MSFT does have a frontier AI Lab. My friend works there. I don’t know what they’re doing. But MSFT is one of like 5 entities that actually have the talent and physical infrastructure to compete in model-building.
At one point there were rumours that they'd do that. They also have the rigts to oAI models for a few more years still, so they could always use that but apparently they're also compute starved (like anyone else).