Anthropic's Mythos model has contributed to a substantial increase in Firefox security bug fixes compared to the previous year.

A different kind of AI productivity gain. Firefox found and fixed 423 security bugs compared to 31 at the same time last year, after using Anthropic’s unreleased Mythos model. “These things are actually just suddenly very good” Brian Grinstead, a distinguished engineer at Mozilla, told TechCrunch https://techcrunch.com/2026/05/07/how-anthropics-mythos-has-rewritten-firefoxs-approach-to-cybersecurity/

Mozilla says Anthropic's Mythos Preview and other AI models helped it identify and ship 423 Firefox security bug fixes in April, compared to 31 a year earlier (Russell Brandom/TechCrunch) https://techcrunch.com/2026/05/07/how-anthropics-mythos-has-rewritten-firefoxs-approach-to-cybersecurity/ http://www.techmeme.com/260507/p51#a260507p51

#Anthropic’s #Mythos has rewritten #Firefox’s approach to #cybersecurity #Mozilla fixed 423 Firefox bugs in April, rate more than 5x higher than 76 fixes issued in March and 20 times higher than its 21.5 monthly average last year “These things are actually just suddenly very good,” Brian Grinstead, distinguished engineer at Mozilla. “We see that on our own internal scanning, we see that on external bug reports, and we see that in all sorts of signals across the industry.” https://techcrunch.com/2026/05/07/how-anthropics-mythos-has-rewritten-firefoxs-approach-to-cybersecurity/