OpenAI just rolled out the full version of GPT 5.5 Cyber, a specialized AI built for cybersecurity. And they're pretty excited about one thing: it beat Anthropic’s Claude Mythos 5 on CyberGym, which is a tough benchmark that tests whether AI can spot known software vulnerabilities. This launch follows a preview version from a few months ago and really shows OpenAI is putting more energy into cybersecurity as a major use case for advanced AI.This new model doesn’t just find basic vulnerabilities. OpenAI says GPT 5.

Amid concerns about AI models’ cybersecurity capabilities, OpenAI revealed an improved version of GPT-5.5-Cyber and its “Patch the Planet” initiative to fix open-source software…

OpenAI is rolling out the full, limited-release version of GPT-5.5-Cyber—a specialized AI model that outperforms its predecessors and Claude Mythos 5 in security benchmarks like…