In episode 68 of Cloud Computing with Fexingo, Lucas and Luna dive into a quiet-but-radical shift in cloud pricing: GPU instances billed by the millisecond instead of the second or hour. They trace the change from NVIDIA's H100 to the upcoming Rubin architecture, explain why providers like AWS, Azure, and Google Cloud are moving to sub-second billing for AI workloads, and unpack what this means for inference costs, bursty training jobs, and enterprise budgeting. Along the way, they cite specific examples—like a 47% cost reduction for a 500-millisecond inference call on an H100 cluster—and discuss how the shift pressures traditional cloud financial management tools. If you're running AI workloads or managing cloud spend, this episode gives you one concrete number and one negotiation tactic to use in your next contract renewal.