**OpenAI says new GPT-5.5-Cyber outperforms Anthropic&\#039;s Mythos on cybersecurity benchmark**

> <p\><img width="1376" height="768" src="https://the-decoder.com/wp-content/uploads/2026/04/openai\_logo\_orange.png" class="attachment-full size-full wp-post-image" alt="" style="height: auto; margin-bottom: 10px;" decoding="async" fetchpriority="high" /\></p\> <p\> OpenAI is expanding its Daybreak cybersecurity initiative with an updated Codex Security plugin, the full GPT-5.5-Cyber model, and a partner network with more...

**来源信息**
- **来源**：The Decoder：AI News（RSS）
- **分类**：论文
- **发布时间**：2026-06-23 18:43（北京时间）
- **原文**：[打开原文](https://the-decoder.com/openai-says-new-gpt-5-5-cyber-outperforms-anthropics-mythos-on-cybersecurity-benchmark)