Introduction to GPT-5.5 and Its Breakthrough in Cyberattack Simulation OpenAI’s GPT-5.5 just became the second AI ever to pull off a full, end-to-end cyberattack in a test run. This means the AI acted like a skilled hacker, breaking into a fake company’s computer network from start to finish. Only Anthropic’s Claude Mythos has done this before. Security experts are watching closely. They say this milestone shows how fast AI is catching up with human hackers—even the best ones. The test, made by the AI Security Institute, wasn’t just about stealing passwords. It involved sneaking past defenses, moving through different computers, and grabbing fake company data. This achievement is a wake-up call for the tech world. It’s proof that the gap between smart machines and real hackers is shrinking fast [Source: Decrypt]. Comparing GPT-5.5 and Claude Mythos: AI Advancements in Cyberattack Capabilities GPT-5.5 and Claude Mythos are now in an elite club.…