GPU compute price arbitrage — ONE $0.25 call returns live $/GPU-hour for one GPU class (H100, H200, B200, A100, L40S, RT

GPU compute price arbitrage — ONE $0.25 call returns live $/GPU-hour for one GPU class (H100, H200, B200, A100, L40S, RTX 4090/5090) across the vast.ai marketplace floor, RunPod community/secure cloud, and the AWS on-demand anchor, plus the spread multiple and 24/7 monthly savings versus the anchor. Marketplace-vs-hyperscaler spreads of 3-4x are routine in 2026 — for agents provisioning training or inference this is direct spend recovery. Live provider APIs, no LLM in the path.