
After dissing Anthropic for limiting Mythos, OpenAI restricts access to Cyber, too
OpenAI will begin rolling out its cybersecurity testing tool, GPT-5.5 Cyber only "to critical cyber defenders" at first.
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OpenAI will begin rolling out its cybersecurity testing tool, GPT-5.5 Cyber only "to critical cyber defenders" at first.

Anthropic told TechCrunch it is investigating the claims, but maintains that there is no evidence that its systems have been impacted.

CTO says new AI model is "every bit as capable" as world's best security researchers.
This week, during a podcast appearance, OpenAI CEO Sam Altman called out his competitor's new cybersecurity model, noting that the company was using fear to make its product sound more impressive than it actually is.
The gap between AI insiders and everyone else is widening, and the spending, suspicion, and even new vocabulary are starting to show it. While OpenAI is busy buying up everything from finance apps to talk shows, a certain shoe company just rebranded as an AI infrastructure play, and Anthropic unveiled a model it says is too powerful to release publicly …but apparently not too […]

New model is the first AI system to complete a difficult multistep infiltration challenge.

In an interview at the Semafor World Economy summit this week, Anthropic co-founder Jack Clark explained why the company was still engaged with the U.S. government while simultaneously suing them.

Anthropic said this week that it limited the release of its newest model, dubbed Mythos, because it is too capable of finding security exploits in software relied upon by users around the world. Are real cybersecurity concerns a cover for a bigger problem at the frontier lab?

A select group of customers is testing the Claude Mythos Preview.

The new model will be used by a small number of high-profile companies to engage in defensive cybersecurity work.