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 Corp. announced that Grok 3 and Grok 3 Mini, AI models developed by Elon Musk’s xAI, are now available on its Azure AI Foundry platform, according to Bloomberg. The addition comes as Microsoft deepens its AI offerings to compete with Amazon and Google in hosting next-generation models.