Claude Opus 5 finds security vulnerabilities about as well as Mythos 5, says Anthropic. However, it performs differently when it comes to exploiting them.

Anthropic's latest Claude upgrade targets developers and enterprises with stronger coding, better reasoning efficiency, prompt-cache-friendly tool changes, and near-Fable…

Opus 5 is a step change improvement for the Opus tier powering long-running agents while delivering improvements in coding and professional work.