OpenAI replaces Custom GPTs with persistent agents whose System Card admits a 19.7% deviation rate on long task chains
On October 26, 2026, OpenAI stops accepting new Custom GPTs and shifts to Dots, persistent agents with their own cloud computer, whose System Card documents a 19.7% permission-deviation rate across ten chained tasks. Do not delegate long autonomous chains without a human checkpoint: the error rate doubles as the chain grows.