---
title: "Our evaluation of OpenAI's GPT-5.5 cyber capabilities"
source_name: "Simon Willison's Weblog"
original_url: "https://simonwillison.net/2026/Apr/30/gpt-55-cyber-capabilities/#atom-everything"
canonical_url: "https://www.traeai.com/articles/f049ece7-f015-407b-ba13-5645554ca004"
content_type: "article"
language: "中文"
score: 7.5
tags: ["OpenAI","GPT-5.5","网络安全","AI安全研究所"]
published_at: "2026-04-30T23:03:24+00:00"
created_at: "2026-05-01T04:29:02.087949+00:00"
---

# Our evaluation of OpenAI's GPT-5.5 cyber capabilities

Canonical URL: https://www.traeai.com/articles/f049ece7-f015-407b-ba13-5645554ca004
Original source: https://simonwillison.net/2026/Apr/30/gpt-55-cyber-capabilities/#atom-everything

## Summary

英国AI安全研究所评估OpenAI的GPT-5.5在发现安全漏洞方面的能力，认为其与Claude Mythos相当，但GPT-5.5现已普遍可用。

## Key Takeaways

- GPT-5.5被评估具有与Claude Mythos相似的网络安全能力。
- 不同于Claude Mythos，GPT-5.5当前即可供广泛使用。
- 评估由英国AI安全研究所进行，增加了结果的可信度。

## Content

Title: Our evaluation of OpenAI’s GPT-5.5 cyber capabilities

URL Source: http://simonwillison.net/2026/Apr/30/gpt-55-cyber-capabilities/

Published Time: Fri, 01 May 2026 04:28:17 GMT

Markdown Content:
# Our evaluation of OpenAI's GPT-5.5 cyber capabilities

# [Simon Willison’s Weblog](http://simonwillison.net/)

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30th April 2026 - Link Blog

**[Our evaluation of OpenAI's GPT-5.5 cyber capabilities](https://www.aisi.gov.uk/blog/our-evaluation-of-openais-gpt-5-5-cyber-capabilities)**. The UK's AI Security Institute [previously evaluated Claude Mythos](https://www.aisi.gov.uk/blog/our-evaluation-of-claude-mythos-previews-cyber-capabilities): now they've evaluated GPT-5.5 for finding security vulnerability and found it to be comparable to Mythos, but unlike Mythos it's generally available right now.

Posted [30th April 2026](http://simonwillison.net/2026/Apr/30/) at 11:03 pm

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