The upper limit of AI computing is expected to reach 80 gigawatts in 2027, with the annual growth rate doubling, but the cost per GPU hour will double within half a year to $12-13, with Anthropic's GPU hour cost rising by 82% in two quarters. The growth of GPU supply and price will double simultaneously, with physical reality becoming a bottleneck in demand, continuously pushing up the cost per GPU hour. Theoretically, AI revenue will increase from $140 billion at 38 gigawatts to nearly $500 billion at 43 gigawatts, but high costs may force model companies to adjust the allocation of GPU timing between training and inference, limiting the speed of innovation.