Kyle Wiggers / TechCrunch:Sam Altman says OpenAI was forced to stagger GPT-4.5's rollout because it is “out of GPUs”; the model is wildly expensive, costing $75 per million input tokens — OpenAI CEO Sam Altman said that the company was forced to stagger the rollout of its newest model, GPT-4.5, because OpenAI is “out of GPUs.”