OpenAI says its latest AI model, GPT-6 Cyber, is its most advanced model when it comes to cybersecurity. Yet, the AI startup claims, Cyber is better at not hacking other companies. Just a week after Anthropic had dropped Claude Mythos Preview, OpenAI, has stepped into the arena with their own answer - GPT-5.4-Cyber. It isn't a brand-new frontier beast born from scratch.