Frontier AI models are no longer merely helping engineers write code faster or automate routine tasks. They are increasingly capable of spotting their mistakes.
Anthropic says its newest model, Claude Opus 4.6, excels at discovering the kinds of software weaknesses that underpin major cyberattacks. According to a report from the company’s Frontier Red Team, during testing, Opus 4.6 identified over 500 previously unknown zero-day vulnerabilities—flaws that are unknown to people who wrote the software, or the party responsible for patching or fixing it—across open-source software libraries. Notably, while researchers gave the model a goal—find security flaws in selected software—the model determined its own methods for accomplishing the task, according to Logan Graham, head of Anthropic’s Frontier Red Team.
