Andrej Karpathy Joins Anthropic to Build Pre-Training Research Team

The Announcement

Andrej Karpathy announced on X on May 19, 2026 that he has joined Anthropic. "I think the next few years at the frontier of LLMs will be especially formative," he wrote. "I am very excited to join the team here and get back to R&D." The post drew over 136,000 likes and 21 million views within hours of publication.

Role and Mandate

Karpathy joins under Nick Joseph, Anthropic's Head of Pretraining. His mandate is to build a dedicated sub-team using Claude itself to accelerate pre-training research — a recursive approach where the model actively contributes to improving how future versions of itself are trained.

Career Path

Karpathy is an OpenAI co-founder who led deep learning and computer vision research before departing in 2017 to head Tesla's Autopilot and FSD programs. He rejoined OpenAI in 2023 and left again in 2024 to found Eureka Labs, an AI education startup. He notes he remains "deeply passionate about education" and plans to resume that work over time. Anthropic is now his third major AI lab.

Wider Significance

The hire adds one of the AI field's most prominent researchers to Anthropic's roster, reinforcing the intense competition for top talent between the major AI labs. Karpathy's public announcement drew immediate commentary across the tech community, underscoring both his personal standing and the perceived importance of Anthropic's research direction.