Cisco sings Mythos’ praises – but doesn’t say how many bugs the model uncovered

Cisco sings Mythos’ praises – but doesn’t say how many bugs the model uncovered

By Jessica Lyons
Publication Date: 2026-06-02 18:35:00

Security

Meanwhile, Anthropic adds 150 partners to Project Glasswing

Bug hunting has become a whole lot more exciting in recent months with both Anthropic and OpenAI touting their latest models (that also happen to be super-scary exploit machines). On Tuesday, as Anthropic announced a fourfold expansion to its Mythos preview program, Cisco jumped into the fray, praising the transformative power of AI – but without disclosing how many bugs the latest frontier models found.

Cisco SVP Anthony Grieco in a Tuesday blog said that the advanced AI systems, including Anthropic’s Claude Mythos Preview and OpenAI’s GPT 5.5-Cyber, scanned 1.8 billion lines of code in eight weeks looking for vulnerabilities in Cisco products – a task that otherwise would have taken the networking giant’s advanced security team eight years to accomplish.

However, Grieco, who heads Cisco’s security and trust organization, didn’t say how many…