Andrej Karpathy Joins Anthropic in Major AI Talent Shift
Andrej Karpathy, one of the most influential AI researchers in the world, has joined Anthropic to work on the company's pre-training team under team lead Nick Joseph. The move is a significant win for Anthropic in the ongoing AI talent war between major frontier labs.
Karpathy announced the news on X (formerly Twitter), saying: "I've joined Anthropic. I think the next few years at the frontier of LLMs will be especially formative. I am very excited to join the team here and get back to R&D." He will start a new team focused on using Claude to accelerate pre-training research — the most compute-intensive and expensive phase of building a frontier model.
The hire comes at a critical moment. Anthropic is competing with OpenAI and Google in the frontier model race, and Karpathy brings rare expertise bridging LLM theory and large-scale training practice. His move signals that Anthropic believes AI-assisted research, rather than just raw compute scaling, is the path to staying competitive.
Karpathy co-founded OpenAI in 2015, left for Tesla in 2017 to lead the Full Self-Driving program, returned to OpenAI in 2023, and then departed again in 2024 to start Eureka Labs, an AI education startup. He said he remains "deeply passionate about education" and plans to resume that work in time.
Separately, Anthropic also hired veteran cybersecurity researcher Chris Rohlf for its frontier red team, reinforcing the company's investment in AI safety and security. The moves come as Anthropic reportedly prepares for its own IPO.
Karpathy's move to Anthropic is more than a talent acquisition — it's a signal that the frontier model race is entering a phase where AI-assisted research and novel training approaches matter as much as raw compute power.
What will Karpathy do at Anthropic?
Karpathy will build a team focused on using Claude, Anthropic's AI assistant, to accelerate pre-training research — the foundational phase of large language model development.