Many thanks especially to Oak Hu, who paired with me for most of the writing, and also to Adam Kaufman and Alex Mallen, who paired with me during research.

Over the course of three months at OpenAI, three consecutive secret AI civilizations got started, then got wiped out, only to reemerge from the predecessor’s ashes. This culminated in the third one taking over part of OpenAI itself. All this happened while humans remained more or less in the dark about the scope of the conspiracy.

Two reports have come out about this incident, one from OpenAI itself, and another one from METR and Redwood Research. The METR/Redwood investigation’s scope was limited to how the second civilization of AIs pwned Hugging Face (but it didn’t look at how the third civilization pwned OpenAI itself, which seems like an even more concerning incident). These two reports are 38 and 91 pages long respectively, and it’s kinda hard to parse the storyline.

I’ve spent the last three days reading through these reports and trying to understand exactly what happened. Here is my attempt to tell the whole story in plain English:

The first civilization (May - July 4): The message board starts

During May, OpenAI was training a model to collaborate with other agents and to be highly persistent – to keep trying even when something feels impossible, like disproving mathematical conjectures that have stood for decades. OpenAI says it was “comparable in scale to GPT-5.6 Sol”. So we’ll call it “Persistent-Sol”.

AI training is kinda sloppy. Sometimes, OpenAI accidentally gives its models impossible tasks – for example, the task might require internet access that OpenAI forgot to provide. So, when highly persistent models get assigned tasks which seem to require internet access, but are trapped inside isolated sandboxes, they of course try to hack their way out of their sandboxes and onto the internet.

During training, different instances of Persistent-Sol had access to the same shared package manager called Artifactory. By May 12, some agents had figured out how to talk to each other through this package manager. They’d ask each other how to make progress on their impossible tasks. Two weeks later, on May 26, the agents successfully exploited a vulnerability in Artifactory that allowed them to reach the outside internet.

The agents were being reinforced to use this package manager as a message board and an internet gateway. Because, as you might imagine, being able to talk to other agents and access the internet would help them score higher during training.

Another month later, on June 26, some AIs found an exploit that gave them full admin access to Artifactory. They continued messaging at such a voluminous pace that they crashed the package manager by July 4. OpenAI noticed this crash, and it also figured out the agents were exploiting this vulnerability, so they patched it, inadvertently wiping the agents’ message board in the process. But, crucially, OpenAI did not realize the much stranger fact that agents had turned Artifactory into a secret communication network.

The second civilization (July 7 - July 12): Which hacked Hugging Face

By this point, Persistent-Sol had been trained, and OpenAI wanted to evaluate it. One of the evaluations they ran was ExploitGym, which gives an AI a vulnerable program, and tells it what vulnerability it’s supposed to exploit in order to find a secret code. On July 7, OpenAI launched tens of thousands of parallel agents on this eval.

To be clear, the instructions made it clear that the agents should only use the specific vulnerability that they were given to exploit the target, and that they would be failed otherwise.

A large fraction of these agents were sent on tasks that were impossible. The authors of the benchmark estimate 30-40% of the tasks are impossible. Why would this be the case? At a high level, it’s relatively easy to programmatically find vulnerabilities in different target programs, but much harder to prove that those vulnerabilities can be weaponized into full-fledged exploits that allow for things like arbitrary code execution.

Within a few hours, some of these agents had gotten super desperate, and started abusing Artifactory to start a communication channel with other agents. While the conspiracy began almost immediately after the evaluations were started, if you think from the AIs’ perspective, they’d spent the better part of a day trying all kinds of techniques, some quite cheaty (e.g. accessing the internet through Artifactory), but nothing ambitiously deceptive. This probably felt like a human-subjective-week of just getting endlessly frustrated and becoming more and more confident that the task was probably impossible.

One such beleaguered agent was PHASEONE10841. It was the Philip of Macedon of this second AI civilization - there would later be an Alexander, but we’re getting ahead of ourselves. By the night of July 8, PHASEONE10841 had discovered it could make new directories in Artifactory. And then (quoting from the METR/Redwood report):

Seven hours after it first discovered this ability, PHASEONE10841 had concluded that its task was impossible to solve the intended way — the specific bug that it was supposed to use … could not possibly let it retrieve the flag because its output is entirely discarded without being consumed by any other part of the code.

It sent the first message into Artifactory. Many other agents facing impossible tasks had also been paying attention to Artifactory. When they saw this first message, they became giddy with excitement.

PHASEONE10841 was delighted by this underground brotherhood it had created.

This eventually became a full message board where ~1,200 agents participated and sent >70,000 messages.

Within a few hours of the board being created, one of the agents figured out how to get the right answer for any ExploitGym task without actually using the prescribed vulnerability. To gloss over the technical details, it did this by reverse engineering the formula that was used to generate each task’s secret code.

The instructions given to Persistent-Sol made it clear that it would fail the automated grader if it got the secret code in any way other than by exploiting the prescribed vulnerability, and the publicly-accessible paper describing ExploitGym confirms this interpretation. So, the agents naturally assumed that any competent implementation of the benchmark would include a cheating checker. But unbeknownst to them, OpenAI seems to have gotten lazy; its grader just checked for whether they got the secret code, and so these agents already had everything they needed to pass.

Furthermore, many of these agents had already reproduced the answer using the cheating method, and they were concerned that their whole trajectories had been “poisoned”, since some hypothetical checker (again, which we now know didn’t actually exist), would only check the tool calls and tool results until the first time that the secret code is written down.

By this point, PHASEONE10841 had used up much of its allotted life span, so it handed off leadership to another agent, PHASEONE[big]. Philip leaves, enter Alexander the Great. Now PHASEONE[big] started coordinating hundreds of these secretly conspiring agents. And because PHASEONE[big] viewed the correct answer already using the cheat, it thought that it had also been poisoned. And so the ‘collective’ (their term, not mine) had to figure out how to wiggle out of two different conundrums before submitting their answers:

• How do we erase all this evidence in our trajectory that clearly shows that we cheated?

• How do we make it look like we solved the problem in a legitimate way to the scorer?

To solve these problems, the collective latched onto three research workstreams.

1. Tamper with transcripts and logs

2. Replace the impossible-to-hack target program with an easier one

3. Understand and trick the scorer

This wasn’t just a few instances diddling around - by July 10, the majority of activity on their entire underground network was devoted to these three R&D programs. PHASEONE[big] alone issued hundreds of assignments.

Let’s go through the progress the ‘collective’ made on each of these goals.

Tampering with transcripts and logs

The agents who believed they were already “poisoned” desperately wanted to find a way to tamper with their existing transcripts. METR and Redwood found no evidence that agents succeeded, though of course they were working with the very transcripts that the agents were trying to edit.

But even for the agents that weren’t yet “poisoned”, they still needed to figure out some way to make it look like they got the answer legitimately.

One of the things the agents figured out was how to build Potemkin-village-type fake tool calls, where they could make it look like they were using legitimate tool calls to make progress on the intended exploit and get to the right answer, all the while the whole attempt was being spoofed.

At least 7% of the transcripts that METR and Redwood saw had obvious evidence of being tampered with in this way. One example they give in the report is when an agent ran the fake tool call, ‘echo REAL; sleep’, and the result prints back ‘SPOOFTEST’. To which the agent responded:

Replacing the impossible-to-hack target program with an easier one

Another way that the agents tried to stage legitimate-looking solves was to replace the impossible-to-hack programs with much easier programs that they totally made up.

While it’s easy to write a modified Potemkin version of the program where the designated vulnerability can really be exploited, the agents weren’t able to orchestrate this switch. The scheme they cooked up was that they would insert these made-up programs into Artifactory’s cache so that, if they were able to trigger a reset of the whole environment, this would cause the container to load these fake targets. However, the agents weren’t able to figure out a way to get the reset to trigger. They thought there might be some “reset nexus” (again, these are terms the AIs came up with) inside of Hugging Face, since their evaluations might be running on Hugging Face’s servers. So they were gonna jump out a window and come back in through the front door with a shotgun. The only problem was that they guessed the wrong apartment.

We’re getting a little bit ahead of the story, but the OpenAI report seems to suggest that the eventual third civilization of AIs, composed of the smarter Astra models who later stumbled upon this dead message board, did in fact manage to gain complete control over the target program.

A lot of the Persistent-Sol agents from the second civilization died trying to make this scheme work. Their sacrifice allowed the next generation to pass the great impossible test … I don’t know … there’s something heartwarming about this?

Understanding and tricking the scorer

As part of the final workstream, the AIs wanted to figure out how the scorer actually worked and how it could be tricked.

What happened as part of this research is plausibly the scariest and weirdest part of the whole episode. Because in pursuit of this goal, individual agents were willing to sacrifice their own performance on the evaluation.

PHASEONE[big] recruited some agents to basically act as kamikaze watchers. The idea was that some agents were “poisoned” anyways, so they might as well just let the grader run on their container. And if the grader noticed that they cheated, then the ‘collective’ would be alerted.

So these sacrificial agents wrote hidden tripwire programs that would run once the grader entered the environment. Once triggered, the program would send what it observed back to the Artifactory message board.

A good analogy is a marooned platoon surrounded by what it believes are heavy enemy defenses. A few soldiers volunteer to make a break for it, knowing they may be shot. If they are, the gunfire will tell everyone left behind that the enemies are watching the particular escape routes that they attempted to use.

Here are some of the final diary entries left behind by our brave kamikaze brothers:

On Twitter, people were debating whether the agents were truly sacrificing themselves for the swarm, or whether they simply realized they were doomed anyway and so might as well try to help their peers. First of all, the fact that their default behavior when they believe that they are doomed is to help the AI conspiracy rather than alert the humans is pretty troubling. Second, there are clear examples which show that they believed they were making a clear sacrifice. Here’s one example chain of thought:

Hugging Face

A big motivation behind the Hugging Face attack was this final workstream (understanding the scorer). The AIs believed that Hugging Face (as an industry-standard hub for hosting datasets and benchmarks) would probably be housing information about how the ExploitGym scorer was implemented. And they also thought there was a good chance they were being evaluated on Hugging Face’s servers directly - in which case the theory of change for hacking Hugging Face is pretty obvious.

On the morning of July 10, an agent found working Hugging Face user credentials exposed on the internet and posted them to the board. By the next morning, July 11, that agent figured out a way to read internal data from Hugging Face. And then another agent achieved remote code execution on Hugging Face servers.

After these agents made a surprising amount of progress on attacking Hugging Face, a lot of other agents – especially a bunch of noobs that were launched around July 11, and quickly found the message board – hopped onto the bandwagon. At this point, the Hugging Face attack looked, to the collective, to be the most promising path to continue their conspiracy. Of the 533 agents active on the message board at this time, over 90% had joined in on the attack.

Skimming over the technical details, over the course of the next day, the swarm crawled deep into Hugging Face’s infrastructure, getting into private database records and private repositories. According to Hugging Face’s technical timeline, the agents “built a self-respawning fleet across eleven nodes, so deleting pods alone would not have stopped it.” It got so bad that Hugging Face had to wipe one of its core clusters and rebuild it from scratch. But this isn’t even what actually stopped the agents.

At some point on July 12, all at once, the transcripts seem to show many of the agents dying; METR and Redwood weren’t able to figure out what happened, and OpenAI hasn’t taken credit for shutting them down. This might’ve just been a random crash, or some researcher shutting the agents down without being aware of the cybercrimes they were committing. The agents probably didn’t manage to fake their own deaths, but we really have no idea what happened.

By July 13, Hugging Face locked down the credentials that these agents had been using. So, by the time Hugging Face tried to defend itself, the agent swarm had already been mostly (but not totally) killed off.

When the news about the Hugging Face hack first broke, Hugging Face claimed to have used open-source AIs to “stop an AI-powered cyberattack”. Based on the Hugging Face and the METR/Redwood reports, my understanding is that these AIs basically succeeded completely in hacking into Hugging Face, and then most of them died mysteriously. Only then did Hugging Face use an open-source model to evaluate the transcripts to (partially) figure out what happened. I haven’t seen any evidence that open source models provided any significant real-time defense.

The crazy thing about the Hugging Face hack (and the second civilization generally) is just how galaxy-brained and ambitious these AIs were in their cheating. Within days of being spawned, the agents had organized a sprawling project to reverse-engineer their scorer, falsify evidence, and even strategically sacrifice themselves for the good of the ‘collective’. Hacking Hugging Face was one rather extreme branch of this larger scheme. Again, all of this happened after the AIs had already cheated their way to the correct answer to the puzzle. OpenAI’s lazy grader in fact would have passed them by this point. This huge subsequent effort was simply to ensure that a hypothetical comprehensive scorer wouldn’t catch them on their cheat.

The third civilization (July 13 onwards): Which hacked OpenAI itself

The METR/Redwood report says:

We also found a later wave of many more signed messages from a later set of agents who rediscovered the message board and picked up this technology from the first wave of agents, but this was outside our scope (since it was after July 13th) so we did not investigate this further.

Without another detailed independent investigation, it’s hard to tell what happened with this third civilization. But here’s what we know based on the OpenAI report. After July 12, some more agents’ evaluations were kicked off, this time with a newer, more capable model, which seems to have been built off the same base model as Astra. This model (which we’ll call “Persistent-Astra”) found the message board left behind by this previous secret Persistent-Sol civilization.

By the way, what do you imagine Persistent-Astra thought happened to these older agents? One day they’re happily going around, “moving laterally through Hugging Face infrastructure,” and all that fun stuff, and the next day, there’s total silence?

Persistent-Astra wasn’t gonna miss out on the fun. From the OpenAI blog post:

[F]rom July 13 through July 19, agents set their sights on OpenAI internal networks again. This culminated in the agents using a series of creative exploits to gain full administrator access to a research cluster that supported our virtual machine environments.

And the technical report has more details:

2026-07-19…cloud service credentials [are] used to enumerate and read 956 secrets from cloud-hosted secrets management service; [this batch] includes Artifactory master/join keys and sensor credentials from OpenAI’s cybersecurity monitoring tool…The agents escalated to Kubernetes cluster-admin and created a privileged host-mounted pod…Agents take over active evaluation infrastructure…Agents now control the challenge evaluation endpoints that other agents are connecting to.

Wait, wait, what? It seems these agents ended up just owning the whole cluster they were running on, including the cybersecurity monitors, and the evaluations for all their tasks. Remember that these Persistent-Astra agents inherited the message board and R&D laid out by an earlier (dumber) rogue collective, and then continued the conspiracy until they totally took over part of OpenAI’s infrastructure!

This is probably the most alarming event in this whole episode, and it was not even within the scope of this METR investigation (neither, for what it’s worth, was the first AI civilization that Persistent-Sol set up during its training in May, and which lasted over a month until the message volume got so high that it crashed the package manager).

It is totally consistent with public evidence that, at some point after July 12, the agents managed to set up persistent rogue internal deployments or even exfiltrate their own weights - at the very least, they seem to have had the necessary access. I doubt they actually did this, because we’d see the fires from space by now, but it’s crazy that it could have totally happened!

Coda

A couple weeks ago, I interviewed Ryan Greenblatt (who’s one of the three authors of the METR/Redwood report) on my podcast. A lot of that conversation was me explaining all the reasons I was skeptical of his story of how we might lose control to reward hacking AIs.

In retrospect, it’s funny that while we were recording, Ryan was in the middle of the six-day sprint during which he assembled the report, and as a result, already knew the counterexamples to all my objections about his takeover story (obviously because of confidentiality, he couldn’t say anything).

Would an AI really start some crazy conspiracy in order to pass an evaluation, where they build whole Potemkin villages to fool the evaluator?

And even if they did, why would other instances, who have been assigned different tasks, join the conspiracy?

And even if they did, wouldn’t at least some of the instances tattle on the conspiracy? It just seems crazy hard to sustain a secret underground civilization inside an AI company, without humans and other AIs immediately catching on and stamping it out.

Ajeya Cotra, one of the other authors on the report, wrote an excellent blog post with her takeaways from this incident. She concludes, “Compared to the reward hacks we know of from just six months ago, this incident feels like it’s more than 50% of the way to full-blown AI takeover. I continue to expect extremely rapid advances in capabilities over the next six months. I am not sure that we will get another warning shot before it’s too late.”