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https://x.com/karpathy/status/2056753169888334312

OpenAI Co-Founder Andrej Karpathy Joins Anthropic
Posted by BeauHD on Tuesday May 19, 2026 @04:00PM from the AI-hiring-wars dept.

OpenAI co-founder Andrej Karpathy has joined rival AI lab Anthropic. "The hire is a major coup for Anthropic in the high-stakes competition for elite AI talent -- and another sign the company is emerging as a magnet for some of the industry's most respected technical minds," reports Axios. From the report:
Karpathy will start this week on Anthropic's pre-training team, which is responsible for the massive training runs that give Claude its core knowledge and capabilities, according to Anthropic.

Karpathy will help launch a new team focused on using Claude itself to accelerate pretraining research -- an increasingly important frontier as AI companies race to automate parts of AI development. "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," Karpathy said in a post on X.

Karpathy is a rare AI figure with credibility across research, industry and education. He was a founding member of OpenAI before serving as Tesla's director of AI, where he led the computer vision team behind Autopilot. Karpathy coined the term "vibe coding" and recently described himself as being in a "state of AI psychosis" since December -- embracing "tokenmaxxing" and aggressively stress-testing frontier models.

Saludos.