Just over two months after officially announcing his joining Anthropic, Andrej Karpathy updated his personal profile, removing the company affiliation information that previously displayed "Anthropic", sparking widespread speculation about his departure. Some content creators revealed an unconfirmed claim that Karpathy has submitted his resignation, but no reliable source or official statement confirms this. Some netizens noted Karpathy might have modified his profile as early as May this year, and the number of followers in two circulating screenshots differs by around 900,000, suggesting they were not taken at the same time. Tibo, the head of OpenAI Codex, seemingly stepped in to respond to the rumors. Separately, Anthropic is involved in another public controversy: the night before last, Jensen Huang posted an open letter co-signed by NVIDIA emphasizing the need for both top-tier closed-source and open-source models. Elon Musk reposted it, and OpenAI added its name to the co-signing list, but Anthropic is not on the list. Karpathy had joined Anthropic on May 19 this year, working on the core pre-training team under Nicholas Joseph.