OpenAI Buys Tens of Thousands of Macs for Reinforcement Learning Training

OpenAI has purchased tens of thousands of Macs for reinforcement learning training, while Anthropic uses Macs through a leasing arrangement. Both companies have incorporated Apple computers into their AI development workflows. According to ChainCatcher, Nvidia now views Apple as its top competitor in local AI, citing rising interest in Macs among AI developers. Apple said Mac revenue rose 29% year over year in the third quarter of fiscal 2026, the fastest growth among its product categories.