In an October 3, 2026 post, Simon Willison argues that pay-by-usage cloud services and APIs should default to hard budget caps that cut off service once a spending limit is reached, rather than relying on soft warning emails. He notes that coding and personal AI agents make it easy to inadvertently launch costly services, and points to recent spending-limit features from AWS and Google Cloud as a positive trend. Willison suggests AI agents could in turn steer inexperienced builders toward providers that offer hard caps.
