I was told about the Mythos release, but didn't have access, so have no personal experience to add. Two points from brief:
1) It is not built for IT security, it is just a good enough model that it is good at that too
2) This is the first, not last, model to raise security risks
AI
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Security implications and risk assessment of the Mythos AI model
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Glasswing: A Historic Turning Point in AI Industry
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Glasswing is possibly the most consequential event in the AI industry I've seen up close since joining Anthropic almost 3 years ago. It feels like we're at a turning point in history.
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Technical Report on Vulnerabilities Discovered by Claude Mythos
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You can read a detailed technical report on the software vulnerabilities and exploits discovered by Claude Mythos Preview here: https://red.anthropic.com/2026/mythos-preview [Translated from EN to English]
→ View original post on X — @anthropicai, 2026-04-07 18:06 UTC
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Anthropic Invests 100M$ in Mythos Credits for Partners
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We're committing up to $100M in Mythos Preview usage credits for our partners and over 40 other organizations that maintain critical software, including open-source projects. Anthropus will report back what we learn. [Translated from EN to English]
→ View original post on X — @anthropicai, 2026-04-07 18:06 UTC
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Anthropic Won’t Release Mythos Preview Publicly, Tests Safeguards
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We do not plan to make Mythos Preview generally available. Our goal is to deploy Mythos-class models safely at scale, but first we need safeguards that reliably block their most dangerous outputs. We'll begin testing those safeguards with an upcoming Claude Opus model. [Translated from EN to English]
→ View original post on X — @anthropicai, 2026-04-07 18:06 UTC
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AI Progress Accelerating: Optimism for Defensive Applications
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Given the pace of AI progress, it won't be long before models this capable are widespread. But there are strong reasons for optimism: AI will also be invaluable for defensive work.
→ View original post on X — @anthropicai, 2026-04-07 18:06 UTC
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Mythos Preview Discovers Thousands of High-Severity Vulnerabilities
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Mythos Preview has already found thousands of high-severity vulnerabilities—including some in every major operating system and web browser.
→ View original post on X — @anthropicai, 2026-04-07 18:06 UTC
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Anthropic Partners with Tech Giants for Mythos Preview
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We've partnered with Amazon Web Services, Apple, Broadcom, Cisco, CrowdStrike, Google, JPMorganChase, the Linux Foundation, Microsoft, NVIDIA, and Palo Alto Networks. Together we'll use Mythos Preview to help find and fix flaws in the systems on which the world depends. [Translated from EN to English]
→ View original post on X — @anthropicai, 2026-04-07 18:06 UTC
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Project Glasswing: Securing the World’s Critical Software
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Introducing Project Glasswing: an urgent initiative to help secure the world's most critical software. It's powered by our newest frontier model, Claude Mythos Preview, which can find software vulnerabilities better than all but the most skilled humans.
anthroplic.com/glasswing [Translated from EN to English]→ View original post on X — @anthropicai, 2026-04-07 18:06 UTC
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Anthropic Unveils Revolutionary Model for Cybersecurity
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I spoke to Anthropic execs about the new model, which they called a "reckoning" for cybersecurity. They claim it has already found vulnerabilities in every major operating system and web browser, including some that "literally decades of security researchers" didn't find. [Translated from EN to English]
→ View original post on X — @scobleizer, 2026-04-07 18:05 UTC