OpenAI’s GPT-5.5 is as Good as Mythos at Finding Security Vulnerabilities

OpenAI’s GPT-5.5 is as Good as Mythos at Finding Security Vulnerabilities
The UK’s AI Security Institute evaluated GPT-5.5’s ability to find security vulnerabilitie 2026-5-13 11:3:3 Author: www.schneier.com(查看原文) 阅读量:4 收藏

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.

Tags: AI, cybersecurity, vulnerabilities

Posted on May 13, 2026 at 7:03 AM • 0 Comments

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文章来源: https://www.schneier.com/blog/archives/2026/05/openais-gpt-5-5-is-as-good-as-mythos-at-finding-security-vulnerabilities.html
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