What is Anthropic's Claude Mythos Preview?

It's a powerful AI model killer at spotting and exploiting zero-day vulnerabilities in OSes and browsers, but restricted to security researchers via Project Glasswing.

Will AI like Mythos replace human security researchers?

Nah—it amps 'em up. Humans guide, verify, disclose. But without it, you're behind the curve.

When can the public access Mythos Preview?

Not yet. It's gated until vulnerabilities get patched—could be months, prioritizing defense over open release. Check Anthropic's system card and Red Team blog for deets. Simon Willison's got killer coverage too.

🔒 Security & Privacy

Anthropic's Mythos Preview Cracks a 27-Year-Old OpenBSD Zero-Day Overnight

Imagine waking up to a fully weaponized exploit, courtesy of an AI you prompted before bed. Anthropic's new Claude Mythos Preview does exactly that, sniffing out ancient bugs like a 27-year-old OpenBSD zero-day.

theAIcatchup Apr 08, 2026 3 min read

Anthropic Claude Mythos Preview AI model displaying a discovered zero-day exploit in OpenBSD code

⚡ Key Takeaways

Mythos Preview finds and exploits zero-days overnight, including a 27-year-old OpenBSD bug. 𝕏
Restricted to security pros via Project Glasswing to enable defensive patching first. 𝕏
Signals end of human-only expertise era in vulnerability hunting—AI arms race incoming. 𝕏

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theAIcatchup

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#Anthropic AI #Claude Mythos Preview

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Originally reported by Dev.to

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