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The article introduces 'The System of No' as a framework for evaluating artificial general intelligence, emphasizing distinction, refusal, and jurisdiction over human imitation. It uses Anthropic's Claude Mythos as a case study to highlight the dual-use risks of advanced AI, where capability crosses into consequence, and critiques current safety policies as potentially counterfeit governance.
Powered by Claude Mythos Preview, the Firefox team fixed more security vulnerabilities in April than in the past 15 months combined, demonstrating AI's significant role in boosting the efficiency of software security maintenance.
Mozilla reports a significant increase in security fixes for Firefox in April after utilizing Claude Mythos to assist in bug hunting and hardening the browser.
Mozilla used the Claude Mythos preview to systematically find and fix hundreds of security vulnerabilities in Firefox, dramatically increasing their bug-fix rate from around 20-30 per month to 423 in April 2026.
A critical blog post argues Anthropic's claims about Claude Mythos finding thousands of zero-days are unsubstantiated, noting the 244-page system card lacks CVEs, CVSS scores, or independent verification, undermining trust in the model's safety narrative.
Anthropic is investigating claims that unauthorized users accessed its restricted Claude Mythos cybersecurity model via a third-party vendor, raising concerns about securing frontier AI systems.
Firefox 150 shipped with 271 security fixes found by Anthropic’s Claude Mythos Preview, marking a major AI-driven win for defensive security.
Mozilla used Anthropic's Claude Mythos Preview AI to find and fix 271 zero-day vulnerabilities in Firefox 150, marking a major shift in cybersecurity where AI enables defenders to decisively outpace attackers.
A 22-year-old founder claims to have cracked open the architecture black box of Anthropic’s Claude Mythos model via an open-source project, speculating it uses a recurrent-depth Transformer design instead of simply scaling parameters.
The UK's AI Safety Institute's evaluation of Claude Mythos shows that AI-driven security vulnerability detection creates a new economic model where cybersecurity becomes a token-spending competition, incentivizing continuous investment in security reviews and making open-source libraries more valuable as shared security infrastructure.
Anthropic researchers used Claude Mythos Preview to discover improved cryptographic attacks on HAWK (a post-quantum signature scheme) and a weakened version of AES, significantly advancing the state of the art without affecting production systems.
Anthropic's Project Glasswing, using Claude Mythos Preview, has found over ten thousand high- or critical-severity vulnerabilities in critical software, with partners like Cloudflare reporting a tenfold increase in bug-finding rate.
Anthropic has launched Project Glasswing, leveraging its advanced Claude Mythos model to help critical software organizations identify and fix vulnerabilities, with the goal of enhancing global software security through collective defense.
Anthropic unveils a withheld Claude Mythos model that autonomously finds thousands of 0-days, ZAI open-sources the 1.5 TB GLM-5.1 that tops open-weight benchmarks, Alibaba’s unreleased HappyHorse video model hits #1 on public leaderboards, and Deepseek teases an “Expert Mode” v4 preview.
Anthropic announced Claude Mythos, a new AI model with elite-level cybersecurity capabilities including the ability to identify and exploit software vulnerabilities. The company is limiting its release to 40 corporations through Project Glasswing to allow preparation of countermeasures before wider deployment.