The Writers Guild of America is leaving X, the ubiquitous social media platform owned by Tesla founder Elon Musk.

Elon Musk announced this weekend that his team at xAI made improvements to their AI chatbot Grok. Days later, Grok has already gone on several blatantly antisemitic tirades.

A large language model that is integrated into X, Grok acts as a platform-native chatbot assistant. In several posts—some of which have been deleted but have been preserved via screenshot by X users—Grok parroted antisemitic tropes while insisting that it was being “neutral and truth-seeking.”