OpenAI updates GPT-5.5-Cyber, claims better performance than Mythos 5

The new Cyber model not only finds flaws, but offers to fix them automatically. (Picture: Adobe)
Less fabled than the recent Mythos releases, GPT-5.5-Cyber is just as capable, OpenAI claims, and has benchmarks to show it.

The update scores 85.6% in CyberGym versus 83.8% for Mythos 5, and is likewise only available to vetted cybersecurity professionals.

— AI has changed the physics of cybersecurity, OpenAI says, — The bottleneck historically has been finding vulnerabilities, but now defenders are overwhelmed with the number of vulnerabilities found.

Therefore, their Daybreak suite, which includes the Cyber model and Codex Security, moves beyond just threat scanning to actually offering vulnerability patches to fix them.

Since the launch as preview in March, OpenAI claims to have scanned over 30 million commits across 30,000 codebases, with humans having marked 70,000 findings as fixed and 500,000 findings having been fixed automatically.

Read more: OpenAI’s announcement, Launch tweet, writeup on SiliconAngle. Discussion on r/Singularity.