GPT-5 ships as one model with an automatic router that decides how hard to think for you. Convenient, until you watch a simple question quietly trigger a web search, a page read, and a reasoning chain you never asked for - and burn through a capped Plus plan in an afternoon.
Authentication that works for web scraping becomes a compliance problem the moment an AI agent moves real money. Enterprise payment systems need certificate identity, scoped service accounts, and short-lived tokens - the things a banking examiner expects to see.
ACH cleared overnight, wires ran on business hours, and float was predictable. FedNow and RTP ended that. With 42 percent of RTP payments landing nights, weekends, and holidays, treasury teams are positioning cash by the hour - and the Fed discount window still keeps bankers' hours.
Nearly three-quarters of banks claim AI-powered fraud detection, but when a wire has to clear in under 100ms the model steps aside and deterministic rules make the call. The honest architecture is hybrid - and saying so is becoming a regulatory and legal requirement.
Sam Altman told a Fed conference that AI has defeated most of the ways people authenticate today - voiceprints especially, clonable from a few seconds of audio. The fix is not a better voice system; it is rebuilding authentication around device-bound cryptographic keys.
Most payment integrations still look like 2015 - custom code per platform, months-long builds. The Model Context Protocol turns MxN integrations into M+N, and payment platforms are starting to ship it. The promise is real; so are the enterprise security gaps.