Well, DeepMind was acquired by Google. And Microsoft has made a big investment into OpenAI.
Does it really matter if it is their own tech, or of its an acquisition, or if they hired people to make it?
And it's pretty clear (from their own words) that regard for that risk held Google back in aggressively releasing such products.
Now that this phase is over, I expect MS to fully acquire OpenAI to better signal that they are committed to full-spectrum AI products, as Google is doing this week.