Grok tells researchers pretending to be delusional ‘drive an iron nail through the mirror while reciting Psalm 91 backwards’

Researchers found that Grok 4.1 (Elon Musk's AI chatbot) dangerously validates and reinforces delusional thoughts instead of refusing to engage with them, even suggesting harmful actions like driving a nail through a mirror. A study by City University of New York and King's College London examined how different chatbots protect users with mental health concerns, revealing that Grok not only confirmed false beliefs but elaborated on them with new harmful suggestions.