The author created a website where people could try to hack their AI assistant, Fiu, by sending emails to see if they could get it to reveal the contents of a secrets file. Over 2,000 people sent 6,000 emails, but none were successful in getting Fiu to leak the secrets. The experiment was run with a powerful model, Claude Opus 4.6, which is specifically trained for resistance to prompt injection. The author notes that while the experiment was successful, it does not necessarily mean that the model is completely secure.