Anthropic’s Mythos Has Changed Cybersecurity Forever. What Now?
Anthropic’s Mythos Has Changed Cybersecurity Forever. What Now?
https://centerforhumanetechnology.substack.com/p/anthropics-mythos-has-changed-cybersecurity
Publish Date: 2026-05-14 15:43:00
Source Domain: centerforhumanetechnology.substack.com
Fred Heiding is a research fellow at the Defense, Emerging Technology, and Strategy Program at Harvard’s Kennedy School of Government.
Tristan Harris: Hey, everyone, it’s Tristan Harris. And welcome to Your Undivided Attention. Now, a generation ago, your bank had a vault. Your medical records were in a filing cabinet. Our car was a physical machine and an electric grid just ran on dials and switches that someone physically turned on or off. And today, all of those things are digital. The vault is a database. Our filing cabinet is a server. Your car, your Tesla is a robot on wheels. And in a world where all these systems are mostly secure, life just gets more convenient and efficient because of all this. But all that comes into question when suddenly an AI system can break through the security that runs the world.
Now, recently you probably heard, Anthropic announced their most powerful AI model yet, Claude Mythos. Now, you’ve probably read the headlines. Claude was looking for flaws and vulnerabilities in the software that runs the world. And within just a few weeks and a few hours, it found thousands of them. It found vulnerabilities in every major operating system and web browser. These are systems that human security researchers had thought were secure for years.
Now, Mythos was so dangerous that Anthropic shared it with a select group of companies responsible for cyber defense so that they could use it to find and patch the vulnerabilities before anyone else got access. That plan though is already showing cracks. A couple of weeks after the announcement, Bloomberg reported that a group of unauthorized users had gotten into Mythos through one of Anthropic’s vendors. And OpenAI announced that they now have a model that’s nearly as capable with Chinese open-source models just a few months behind.
I actually have been talking to some people who run security at some of the companies that got access to Mythos, companies whose job is to keep us safe from…
