OpenAI co-founder Andrej Karpathy joins Anthropic
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Andrej Karpathy, one of the best-known AI researchers in the world and a founding member of OpenAI, announced Tuesday that he's joining rival AI lab Anthropic.
Why it matters: 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.
Driving the news: 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.
Between the lines: 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.
Zoom out: Since leaving Tesla in 2022, Karpathy has become one of AI's most influential public educators, building a massive following through technical explainers and educational content on YouTube and X.
- He said Tuesday that he remains "deeply passionate about education" and plans to return to that work "in time."
The bottom line: The AI race is often framed around massive funding rounds and scarce computing power. Just as important is the fierce competition for the small pool of researchers — like Karpathy — capable of advancing the frontier.
