Mozilla says 271 vulnerabilities found by Mythos have "almost no false positives"
The developer of Firefox says it has "completely bought in" on AI-assisted bug discovery.
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How Anthropic’s Mythos has rewritten Firefox’s approach to cybersecurity
Security researchers at Mozilla say Anthropic's Mythos has unearthed a wealth of high-severity bugs in Firefox.
GPT-5.5 matches heavily hyped Mythos Preview in new cybersecurity tests
New results suggest Mythos' cyber threat isn't "a breakthrough specific to one model."
After dissing Anthropic for limiting Mythos, OpenAI restricts access to Cyber, too
OpenAI will begin rolling out its cybersecurity testing tool, GPT-5.5 Cyber only "to critical cyber defenders" at first.