OpenAI Daybreak Goes Head To Head With Anthropic To Redefine Security

InnovationEnterprise TechOpenAI Daybreak Goes Head To Head With Anthropic To Redefine SecurityByTim Keary,Contributor.Forbes contributors publish independent expert analyses and insights. Tim Keary is a reporter covering enterprise AI adoption.Follow AuthorMay 12, 2026, 02:49pm EDT--:-- / --:--This voice experience is generated by AI. Learn more.This voice experience is generated by AI. Learn more.AI securitygettyThe frontier AI race is setting its sights on cybersecurity. On Monday, OpenAI announced Daybreak, a cybersecurity initiative designed to help defenders leverage frontier AI models to identify and patch software vulnerabilities with AI. According to the announcement blog post, Daybreak has been developed to help make software resilient by design. “It starts from the premise that the next era of cyber defence should be built into software from the beginning by not only finding and patching vulnerabilities, but being resilient to them by design,” the post said. As part of the initiative, OpenAI will provide customers with access to GPT-5.5, GPT-5.5 with Trusted Access for Cyber and GPT 5.5-Cyber to support a range of defensive use cases. Potential use cases include secure code review, vulnerability triage, malware analysis, detection engineering, patch validation, red teaming and penetration testing. The announcement comes just after OpenAI announced the launch of GPT-5.4-Cyber, a cyber-permissive AI model designed to support defensive use cases as part of the startup’s Trusted Access for Cyber (TAC) program.A New Era Of Cybersecurity Daybreak emerges amid rising anxieties over AI-driven cyber attacks which reached a fever pitch in April when Anthropic announced Claude Mythos Preview, a model that had “found thousands of high-severity vulnerabilities,” including some in every major operating system and web browser.MORE FOR YOUWhile Mythos hasn’t been made available to the general public, its limited release as part of Project Glasswing has raised questions ab...