OpenAI co-founder Andrej Karpathy joins Anthropic's pre-training team TechCrunchAnthropic hires OpenAI co-founder Andrej Karpathy, former Tesla AI leader CNBCTech stocks today: OpenAI co-founder Andrej Karpathy joins Anthropic Yahoo FinanceOpenAI co-founder Andrej Karpathy joins Anthropic's pretraining team qz.com