OpenAI co-founder Andrej Karpathy joins Anthropic to supercharge Claude’s pre-training with AI

https://media.thenextweb.com/2026/05/andrej-karpathy-joins-anthropic-openai-cofounder-pretraining.avif

TL;DR

Andrej Karpathy, one of OpenAI’s original 11 co-founders, has joined Anthropic’s pre-training team. He will build a new group that uses Claude itself to accelerate the most expensive phase of frontier model development.

Andrej Karpathy, one of the original co-founders of OpenAI and among the most recognised AI researchers in the world, announced on Monday that he has joined Anthropic. The move is a significant talent coup for the Claude maker as it races to stay at the frontier of large language model development.

Andrej Karpathy X update, source: X

Karpathy is joining Anthropic’spre-training team, led by Nick Joseph, where he will build a brand-new group focused on a strikingly recursive goal: using Claude itself to accelerate pre-training research. Pre-training, the massive compute-intensive phase that gives a frontier model its core knowledge and capabilities, is the single most expensive part of building systems like Claude. Finding ways to...

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