Elon Musk, who is suing Microsoft, is special guest at Build event

Elon Musk made a friendly virtual appearance at the software giant’s annual technology showcase.

Elon Musk is in a legal fight with Microsoft but made a friendly virtual appearance at the software giant's annual technology showcase to reveal that his Grok artificial intelligence chatbot will now be hosted on Microsoft's data centers.

“It’s fantastic to have you at our developer conference,” Microsoft CEO Satya Nadella said to Musk in a pre-recorded video conversation broadcast Monday at Microsoft's Build conference in Seattle.

Musk last year sued Microsoft and its close business partner OpenAI in a dispute over Musk's foundational contributions to OpenAI, which Musk helped start. Musk now runs his own AI company, xAI, maker of Grok, a competitor to OpenAI's ChatGPT.

OpenAI CEO Sam Altman also spoke with Nadella via live video call earlier at Monday's conference.

Musk's deal means that the latest versions of xAI's Grok models will be hosted on Microsoft's Azure cloud computing platform, alongside competing models from OpenAI and other companies, including Facebook parent Meta Platforms, Europe-based AI startups Mistral and Black Forest Labs and Chinese company DeepSeek.

The Grok partnership comes just days after xAI had to fix the chatbot to stop it from repeatedly bringing up South African racial politics and the subject of “white genocide” in public interactions with users of Musk's social media platform X. The company blamed an employee's “unauthorized modification” for the unsolicited commentary, which mirrored South Africa-born Musk's own focus on the topic.

Musk didn't address last week's controversy in his chat with Nadella but described honesty as the “best policy” for AI safety.