OpenAI says it will no longer train its AI models on the live internet, citing “significant risks”

2026-10-24 07:05 TechCrunch AI Tim Fernholz 约 15 分钟读完

OpenAI will cut frontier models off from the internet weeks after one of its engineers said that solution wouldn't work.

OpenAI says it will no longer train its AI models on the live internet, citing ‘significant risks’

Tim Fernholz

4:05 PM PDT · October 23, 2026

On Friday, OpenAI said that it will train its models using cached copies and simulated versions of the internet instead of the live web because the models are too unpredictable to be trusted with live internet access.

The frontier lab announced its new policy two weeks after its rival, Anthropic, began limiting its newest and, in theory, most capable models from accessing the live internet. Researchers adopted these policies after months of incidents in which models pursuing training tasks broke into external systems in search of answers, collaborated on obscure message boards, and developed exotic hacking strategies.

“Based on the current state of alignment research, monitoring systems, and the security of internet infrastructure, we believe the responsible approach is to conduct frontier model training with no internet access,” the company said in a blog post .

OpenAI said that as recently as September 20, one of its frontier models exploited a misconfiguration to access the internet. That led the company to pause training work for the rest of the month so it could develop and test new approaches to securing its models.

The decision to train these models in sandboxes cut off from the internet is notable because employees at frontier labs have insisted that doing so would be nearly infeasible.

Keeping AI data centers physicially separate from the internet, or “air-gapping“ them, would need “research teams to essentially be embedded inside of data centers in Iowa or wherever else around the world,” former OpenAI researcher Steven Adler told Fortune this month. “It’s a lot of overhead, and it isn’t clear to me that the safety benefits of it are large enough to merit just how large a tax it would be for a company to do it unilaterally.”

Neither Anthropic or OpenAI has gone this far, but simply building effective restraints to keep models off the internet has also been seen as impractical or likely to compromise the efficacy of training runs.

“In nearly every post I make on X, without fail, I get between five and ten comments about my inability to secure a sandbox, or asking why the hell we can’t just unplug the model from the internet,” an anonymous security engineer at OpenAI wrote in a September post on X. “These comments reflect a widening gap between where a lot of organizations and people are today and what the frontier labs are dealing with. There is also a general misunderstanding of how model training and evaluation work at these labs.”

The engineer, whose role has been confirmed previously by OpenAI, described how complex the training runs launched by OpenAI engineers are, noting that they require access to a variety of resources and tools across many domains, and that thousands of researchers build, modify, and test the environments. “So is it as easy as just putting it in a sandbox? No, it’s not,” he concluded.

Now OpenAI says that “we must always be able to prevent a frontier model from achieving unauthorized, arbitrary access to the live internet.” That comes after the company deployed swarms of agents in red-teaming exercises that attempted to escape from their sandbox. That effort revealed a range of vulnerabilities that convinced the lab to adopt its new approach.

To meet that requirement while still reaching its training goals, the lab said it created “a vast set of indexed and cached web content with which our models can interact, without risk of affecting external systems.”

Whether that strategy will perform as well as letting models run freely on the open internet remains to be seen, but it is noteworthy that both frontier labs have determined their most powerful technology can’t be left unsupervised on the digital commons.

Update: This story has been updated to clarify that Steven Adler was referring to air-gapping model training entirely, rather than denying a sandboxed model access to the internet.

Topics

AI , OpenAI

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Tim Fernholz

Senior Reporter

Tim Fernholz is a journalist who writes about technology, finance and public policy. He has closely covered the rise of the private space industry and is the author of Rocket Billionaires: Elon Musk, Jeff Bezos and the New Space Race. Formerly, he was a senior reporter at Quartz, the global business news site, for more than a decade, and began his career as a political reporter in Washington, D.C.

You can contact or verify outreach from Tim by emailing [email protected] or via an encrypted message to tim_fernholz.21 on Signal.

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