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OpenAI's GPT-5.5 is as Good as Mythos at Finding Security Vulnerabilities - Schneier on Security
The UK’s AI Security Institute evaluated GPT-5.5’s ability to find security vulnerabilities, and found that it is comparable to Claude Mythos. Note that the OpenAI model is generally available. Here is the Institute’s evaluation of Mythos. And here is an analysis of a smaller, cheaper model. It requires more scaffolding from the prompter, but it is also just as good.
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schneier.com
OpenAI's GPT-5.5 is as Good as Mythos at Finding Security Vulnerabilities - Schneier on Security
The UK’s AI Security Institute evaluated GPT-5.5’s ability to find security vulnerabilities, and found that it is comparable to Claude Mythos. Note that the OpenAI model is…
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theverge.com
AI cybersecurity updates for MDASH, Mythos, and GPT-5.5.
On Wednesday, the AISI, which evaluates AI models for the British government, said both Anthropic’s Claude Mythos Preview and OpenAI’s GPT-5.5 showed progress well above previous…
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How Dangerous Is Anthropic's Mythos AI? - Schneier on Security
Last month, Anthropic made a remarkable announcement about its new model, Claude Mythos Preview: it was so good at finding security vulnerabilities in software that the company…
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the-decoder.com
New Claude Mythos becomes the first AI model to clear all cyberattack simulations from Britain's AI safety agency
The UK's AI Security Institute has revised its estimate of how fast AI cyber capabilities are doubling—twice. First from eight months down to 4.7, and now Anthropic's Claude…
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theregister.com
AI agents show they can create exploits, not just find vulns
Mythos and GPT-5.5 muscle out the competition