The announcement was made at Microsoft’s Build developer conference on Monday, and was notable given Microsoft’s partnership with OpenAI. Musk founded xAI, the startup behind Grok, but he has also been locked in a feud with OpenAI since stepping down from its board in the late 2010s, citing disagreements over its leadership direction.

Microsoft is bringing Grok 3 and Grok 3 mini from Elon Musk’s xAI to Azure AI Foundry as first-party models, deepening ties with xAI even as Musk continues his legal battle with OpenAI.