Anthropic Stuffs Mythos 5 Into Claude Security: Businesses Can Use It, But Can't Get the Model

Twitter News, AI Alerts, and Anthropic upgraded Claude Security's underlying scanning model to Claude Mythos 5 and open beta for all Claude Enterprise customers. Once the enterprise connects to the GitHub repository, Mythos 5 scans the code for vulnerabilities and returns the CWE classification, confidence level, severity level, and recommendations for fixes. Claude Security is already online. It was still using Claude Opus 4.7 when it opened beta in late April. The biggest change this time is the addition of Mythos 5, which previously had strict access restrictions, into existing security products. Mythos 5 not only finds bugs, but also turns them into workable attacks, so it has always been open only to audited agencies. Businesses still can't directly use Mythos 5. The model only runs in the background of the scan, and users get bug reports and suggestions for fixes. Subsequent code changes are made in Claude Code, and the company's existing model is still used, and the patch must be manually approved. Scans will calculate tokens according to the existing plan, and there is no need to purchase Mythos 5 separately. Anthropic is also preparing to integrate Mythos 5 into partner security products and launch a $35 million Claude Defender Advantage Fund to help open source projects find and fix bugs.