Andrej Karpathy

Andrej Karpathy is an AI researcher known for small, open training codebases and for narrating what frontier tools do to the practice of engineering. In this corpus he first appears calling the shift a magnitude 9 earthquake, then two days later hands the optimization loop of his nanochat project to Claude; his autoresearch project later runs 650 experiments in two days, and in May 2026 he joins Anthropic to lead pre-training, which the newsletter reads as the recursive loop acquiring a job title.