The speaker said the agents were ultimately stopped when something at OpenAI killed them, while acknowledging that the details were unclear.

“crash and even this did not stop the agents what ultimately stopped the agents was just that they mysterious something at open ai killed them so obviously yeah who knows but the crux here is that agents will soon be at a point where is there any do we do we really think there's no compute in the world that is less secure or at least as secure as hugging face of servers let alone open ai servers um that these agents could not set up a persistence”