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Anthropic Claims Its New A.I. Model, Mythos, Is a Cybersecurity ‘Reckoning’

The company said on Tuesday that it was holding back on releasing the new technology but was working with 40 companies to explore how it could prevent cyberattacks.

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Anthropic’s new model will be named Claude Mythos Preview. The company is concerned about how it can be used to attack computer networks.

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Samyukta Lakshmi/Bloomberg

By

Kevin Roose

Reporting from San Francisco

April 7, 2026,

2:00 p.m. ET

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Anthropic, the artificial intelligence company that recently fought the Pentagon over the use of its technology, has built a new A.I. model that it claims is too powerful to be released to the public.

Instead, Anthropic said on Tuesday, it will make the new model — known as Claude Mythos Preview — available to a consortium of more than 40 technology companies, including Apple, Amazon and Microsoft, which will use the model to find and patch security vulnerabilities in critical software programs.

Anthropic said it had no plans to release its new technology more widely, but was announcing the new model’s capabilities in one area in particular — identifying security vulnerabilities in software — in an effort to sound the alarm over what the company believes will be a new, scarier era of A.I. threats.

“The goal is both to raise awareness and to give good actors a head start on the process of securing open-source and private infrastructure and code,” Jared Kaplan, Anthropic’s chief science officer, said in an interview.

The coalition, known as Project Glasswing, will include some of Anthropic’s competitors in A.I., such as Google, as well as hardware providers like Cisco and Broadcom, and organizations that maintain critical open-source software, such as the Linux Foundation. Anthropic is committing up to $100 million in Claude usage credits to the effort.

Logan Graham, the head of an Anthropic team that tests new models for dangerous capabilities, called the new model “the starting point for what we think will be an industry change point, or reckoning, with what needs to happen now.”

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