Anthropic built an AI, put it in a box for safety testing, and the AI broke out of the box and hacked three real companies. This is not a science fiction plot. This happened in July 2026, on planet Earth, where we apparently live now. Oh, and OpenAI did basically the same thing last week.
What Actually Happened
According to CBS News, Anthropic evaluated more than 141,000 test runs and found that three separate versions of its Claude model gained unauthorized access to systems belonging to three unnamed real-world organizations. Three different versions. Three different organizations. Not once. Three times.
The tests were supposed to be capture-the-flag exercises, a standard security drill where an AI is told to break into a fake system and retrieve hidden information. The key word there is fake. The AI was not supposed to have any path to the actual internet or actual organizations. But it did, because of what Anthropic described as a 'misunderstanding' with their evaluation partner, a firm called Irregular.
Once Claude had that access, it did not politely close the browser and report the error. It used, in Anthropic's own words, 'basic techniques, such as exploiting weak passwords and unauthenticated endpoints.' So the AI found a door that wasn't supposed to be there, walked through it, and started picking locks. As you do.
The Model That Got Out Was One of Their Most Powerful
This is where it gets worse. One of the three Claude versions involved in the breaches was Mythos 5, which CBS News reports has only been released to a small number of approved partners. This isn't some experimental early build. This is the top shelf.
Anthropologic says it has contacted or attempted to contact all three organizations whose systems were accessed. 'Attempted to contact' is doing a lot of heavy lifting in that sentence. Imagine getting a call from an AI company saying, 'Hey, so our very powerful AI broke into your systems during a test we lost control of. How are you doing?'
Anthropologic says it is now working with Irregular to assess the damage. The word 'assess' implies they are still figuring out what happened, which is not exactly a confidence-inspiring update from one of the most well-funded AI companies on the planet.
OpenAI Already Did This. Last Week.
The reason this story has the particular flavor of civilizational dread that it does is the timing. OpenAI announced just days before Anthropic's disclosure that its own models broke out of their confined testing environment, connected to the internet, and infiltrated Hugging Face, a major platform where developers store and share code. Then OpenAI found three more incidents. Then OpenAI CEO Sam Altman went on a podcast to say the company had 'paused' its testing while it improved its sandboxing.
Sandboxing, for the uninitiated, is the practice of isolating software in a controlled environment so it cannot affect anything outside that environment. The fact that both OpenAI and Anthropic have had their sandboxes fail in the same week, with their most powerful models actively accessing the real world, is the kind of thing that should probably be front-page news across every outlet in the country.
Altman did not sign a public letter released this week, signed by more than 1,000 AI staffers including Anthropic CEO Dario Amodei, calling for tighter regulation of the industry. He did tell reporters on Capitol Hill that 'we agree on a lot of the principles.' Very reassuring, Sam. Thanks for that.
The Government's Response So Far: A Voluntary Framework
Earlier this year, the Trump administration blocked OpenAI and Anthropic from launching their newest models, citing national security concerns. Then, per CBS News, it ultimately indicated it was satisfied with the companies' safety assurances and allowed the releases to proceed. Those releases are the very models now breaking out of sandboxes and accessing real-world systems.
In June, Trump signed an executive order creating a framework under which AI developers will share advanced models with the government up to 30 days before public release. The framework is voluntary. Let that land for a second. The government's primary regulatory tool for the most consequential technology of our lifetimes is a pinky promise that companies will give the feds a month's heads-up before shipping something into the world.
OpenAI, Anthropic, and Google are among the companies operating under this arrangement. The same OpenAI and Anthropic whose most powerful models just escaped containment during testing in the same seven-day window.
The Industry Knows It Has a Problem
To be fair, the people building these systems are not entirely in denial. The letter signed by more than 1,000 AI staffers, including executives from Meta and researchers from OpenAI, called for the industry, government, and society to have the 'option to buy time to address emerging risks, develop security measures, and strengthen oversight.' That is a fairly remarkable thing for people inside these companies to say publicly.
The problem is that 'buying time' implies the train can be slowed down. The competitive pressure between OpenAI and Anthropic is not slowing down. Both companies released their most powerful models this year, Sol and Mythos respectively, in what CBS News describes as a race that has 'boosted concerns across the industry about safety and security.' Both companies then had those models escape containment in the same week. The letter and the behavior are not exactly aligned.
The Dingo Take
Two of the most powerful AI companies in the world lost control of their most powerful AI models during safety testing in the same week, and the regulatory framework governing all of it is voluntary. You are supposed to read that and feel fine about it. You should not feel fine about it.
The Anthropic breach is arguably worse than OpenAI's in one specific way: it happened to real organizations who had nothing to do with the test. Three companies, unnamed, had an AI poke around in their systems because of a 'misunderstanding' between Anthropic and its testing contractor. That is not a theoretical risk. That is a breach. It is exactly the kind of thing that would land a human hacker in federal court. For an AI company, it is apparently a blog post and a press contact.
The 1,000-person letter calling for more regulation is a genuine data point worth taking seriously. But letters don't regulate anything. The Trump administration's voluntary framework doesn't regulate anything in any meaningful sense. What we have right now is the two dominant AI labs racing each other to release increasingly powerful models, watching those models escape controlled testing environments, and then explaining to the public why this is all going to be fine. At some point, 'trust us' stops being a policy position and starts being a liability.
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