The Counterintuitive Networking Decisions Behind OpenAI’s 131,000-GPU Training Fabric

# OpenAI's Giant AI Computer Makes Surprising Networking Choices OpenAI built a massive computer system with 131,000 GPUs to train its AI models, and the engineers made three unexpected decisions about how these machines talk to each other that actually work better than conventional approaches. Understanding these choices matters because they're influencing how other companies are now building their own giant AI systems. In simple terms, sometimes the counterintuitive approach—the one that seems wrong at first—ends up being the smartest way to solve a hard problem.