{"id":2460,"date":"2026-04-13T17:04:23","date_gmt":"2026-04-13T17:04:23","guid":{"rendered":"https:\/\/blog.ibvl.in\/index.php\/2026\/04\/13\/on-anthropics-mythos-preview-and-project-glasswing\/"},"modified":"2026-04-13T17:04:23","modified_gmt":"2026-04-13T17:04:23","slug":"on-anthropics-mythos-preview-and-project-glasswing","status":"publish","type":"post","link":"https:\/\/blog.ibvl.in\/index.php\/2026\/04\/13\/on-anthropics-mythos-preview-and-project-glasswing\/","title":{"rendered":"On Anthropic\u2019s Mythos Preview and Project Glasswing"},"content":{"rendered":"
\n

The cybersecurity industry is obsessing over Anthropic\u2019s new model, Claude Mythos Preview, and its effects on cybersecurity. Anthropic said that it is not releasing it<\/a> to the general public because of its cyberattack capabilities, and has launched Project Glasswing<\/a> to run the model against a whole slew of public domain and proprietary software, with the aim of finding and patching all the vulnerabilities before hackers get their hands on the model and exploit them.<\/p>\n

There\u2019s a lot here, and I hope to write something more considered in the coming week, but I want to make some quick observations.<\/p>\n

One: This is very much a PR play by Anthropic\u2014and it worked. Lots of reporters are breathlessly<\/a> repeating<\/a> Anthropic\u2019s talking<\/a> points<\/a>, without engaging with them critically. OpenAI, presumably pissed that Anthropic\u2019s new model has gotten so much positive press and wanting to grab some of the spotlight for itself, announced its model is just as scary<\/a>, and won\u2019t be released to the general public, either.<\/p>\n

Two: These models do demonstrate an increased sophistication in their cyberattack capabilities. They write effective exploits\u2014taking the vulnerabilities they find and operationalizing them\u2014without human involvement. They can find more complex vulnerabilities: chaining together several memory corruption bugs, for example. And they can do more with one-shot prompting, without requiring orchestration and agent configuration infrastructure.<\/p>\n

Three: Anthropic might have a good PR team, but the problem isn\u2019t with Mythos Preview. The security company Aisle was able to replicate<\/a> the vulnerabilities that Anthropic found, using older, cheaper, public models. But there is a difference between finding a vulnerability and turning it into an attack. This points to a current advantage to the defender. Finding for the purposes of fixing is easier for an AI than finding plus exploiting. This advantage is likely to shrink, as ever more powerful models become available to the general public.<\/p>\n

Four: Everyone who is panicking about the ramifications of this is correct about the problem, even if we can\u2019t predict the exact timeline. Maybe the sea change just happened, with the new models from Anthropic and OpenAI. Maybe it happened six months ago. Maybe it\u2019ll happen in six months. It will happen\u2014I have no doubt about it\u2014and sooner than we are ready for. We can\u2019t predict how much more these models will improve in general, but software seems to be a specialized language that is optimal for AIs.<\/p>\n

A couple of weeks ago, I wrote about<\/a> security in what I called \u201cthe age of instant software,\u201d where AIs are superhumanly good at finding, exploiting, and patching vulnerabilities. I stand by everything I wrote there. The urgency is now greater than ever.<\/p>\n

I was also part of a large team that wrote a \u201cwhat to do now<\/a>\u201d report. The guidance is largely correct: We need to prepare for a world where zero-day exploits are dime-a-dozen, and lots of attackers suddenly have offensive capabilities that far outstrip their skills.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

The cybersecurity industry is obsessing over Anthropic\u2019s new model, Claude Mythos Preview, and its effects on cybersecurity. Anthropic said that it is not releasing it to the general public because of its cyberattack capabilities, and has launched Project Glasswing to run the model against a whole slew of public domain and proprietary software, with the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-container-style":"default","site-container-layout":"default","site-sidebar-layout":"default","disable-article-header":"default","disable-site-header":"default","disable-site-footer":"default","disable-content-area-spacing":"default","footnotes":""},"categories":[4,299,90,999,53,242],"tags":[91],"class_list":["post-2460","post","type-post","status-publish","format-standard","hentry","category-ai","category-cyberattack","category-cybersecurity","category-exploits","category-uncategorized","category-vulnerabilities","tag-cybersecurity"],"yoast_head":"\nOn Anthropic\u2019s Mythos Preview and Project Glasswing - Imperative Business Ventures Limited<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.ibvl.in\/index.php\/2026\/04\/13\/on-anthropics-mythos-preview-and-project-glasswing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"On Anthropic\u2019s Mythos Preview and Project Glasswing - Imperative Business Ventures Limited\" \/>\n<meta property=\"og:description\" content=\"The cybersecurity industry is obsessing over Anthropic\u2019s new model, Claude Mythos Preview, and its effects on cybersecurity. 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