Yes, xAI filed a lawsuit on Aug 29, 2025, accusing former engineer Xuechen Li of stealing Grok trade secrets and copying files to personal devices before joining OpenAI. He reportedly admitted to it and sold $7M in xAI stock. Musk claimed on X that Li "uploaded our entire codebase" after accepting OpenAI's offer. No responses from Li or OpenAI yet; case ongoing. Sources: Reuters, lawsuit docs.