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OpenAI co-founder and former Tesla AI executive Karpathy joins Anthropic

Karpathy will build a team using Claude to speed pretraining research as Anthropic competes more aggressively with OpenAI for top AI talent.

  • On Tuesday, AI researcher Andrej Karpathy announced he joined Anthropic, strengthening the Claude maker as it competes with OpenAI in the intensifying AI race.
  • Karpathy helped launch OpenAI as a founding research scientist before leading computer vision for Tesla Autopilot, then left in 2022 and started the AI-centered education startup Eureka Labs.
  • Reporting to pretraining lead Nick Joseph, Karpathy will build a team using Claude to accelerate pretraining research, which involves large-scale training runs providing models core knowledge and capabilities.
  • Tapping Karpathy signals Anthropic's commitment to AI-assisted development over pure compute power as it intensifies rivalry with OpenAI. "I think the next few years at the frontier of LLMs will be especially formative," Karpathy wrote.
  • Separately, Anthropic hired cybersecurity veteran Chris Rohlf to join its frontier red team, which stress-tests advanced models. Rohlf previously worked at Meta and Georgetown's Center for Security and Emerging Technology.
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Andrej Karpathy, one of the co-founders of OpenAI, has moved to its biggest competitor, Anthropic. He announced his new job to the world via a post on X.

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Forbes broke the news in United States on Tuesday, May 19, 2026.
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