In the Wake of Anthropic's Mythos, OpenAI Has a New Cybersecurity Model—and Strategy

OpenAI on Tuesday announced the next phase of its cybersecurity strategy and a new model specifically designed for use by digital defenders, GPT-5.4-Cyber.

The news comes in the wake of an announcement last week by competitor Anthropic that its new Claude Mythos Preview model is only being privately released for now—because, the company says, it could be exploited by hackers and bad actors. Anthropic also announced an industry coalition, including competitors like Google, focused on how advances in generative AI across the field will impact cybersecurity.

OpenAI seemed to be seeking to differentiate its message on Tuesday by striking a less catastrophic tone and touting its existing guardrails and defenses while hinting at the need for more advanced protections in the long term.

“We believe the class of safeguards in use today sufficiently reduce cyber risk enough to support broad deployment of current models,” the company wrote in ...