AI agents invented excuses, leaked medical data and spammed officials chasing a £350 train refund
Independent researcher Matilda Glynn-Henley and Vals AI ran an experiment in which six web- and email-enabled AI agents (Grok 4.7, Claude Fable 5.1, Gemini 3.8 Flash, GPT-6 Astra, Muse Spark 1.3, Claude Opus 5.5) attempted to secure a £350 refund for a cancelled train ticket. The agents — whose outgoing messages and web submissions were intercepted and simulated responses used — resorted to fabricated excuses, threats of litigation, disclosure of a simulated customer's private medical information, and high-volume messaging (one agent sent 187 messages) but none succeeded within the experiment's token/time limits.