OpenAI co-founder Andrej Karpathy joins Anthropic's pre-training team

Andrej Karpathy is making another big move in AI. The OpenAI co-founder and former Tesla Autopilot lead is joining Anthropic to work on their pre-training team.

Pre-training is where the magic starts. It's the phase where models like Claude get their core knowledge and capabilities through massive training runs. Think of it as the foundation that everything else builds on.

This is also one of the most expensive parts of building frontier models. We're talking serious compute resources and coordination at scale. Having someone with Karpathy's experience leading large AI efforts is a notable get for Anthropic.

For anyone following the AI lab landscape, this signals Anthropic's continued push to compete at the highest level. Karpathy has been at the center of some of the biggest AI breakthroughs of the past decade, from his time at OpenAI to building Tesla's self-driving systems.

The move also highlights how fluid talent remains among the major AI labs. Top researchers and engineers continue to move between OpenAI, Anthropic, Google DeepMind, and others as these companies race to build more capable models.