OpenAI Co-Founder Andrej Karpathy Joins Anthropic's Pre-Training Team

Andrej Karpathy, an OpenAI co-founder and widely recognized AI researcher, has joined Anthropic’s pre-training team. Pre-training is the large-scale training phase responsible for giving Claude its foundational knowledge and capabilities — one of the most compute-intensive and strategically important stages of frontier model development. The move is a significant talent signal for Anthropic’s frontier model ambitions and shifts competitive dynamics in the AI lab landscape.