For months, Elon Musk publicly attacked Anthropic. Today, however, the billionaire opens the doors of one of the most powerful supercomputers on the market to them. Behind this surprise agreement between SpaceXAI and the company behind Claude lies a reality that has become central in the AI war: dominance no longer depends only on models, but especially on access to GPUs, energy, and infrastructures capable of powering the next generation of artificial intelligences.