Perplexity's @zbraniecki explains why they're now asking frontier AI models to escape their sandbox every single day, after discovering an unexpected security vulnerability: "We asked them to escape, and they couldn’t escape the sandbox, but they were able to bypass a network gateway. They found a way to access a domain they were not supposed to access." "We secured it. We asked them to try again. They failed. We tried newer models. They failed." "Then we just started doing this on a daily…