Anthropic's Mind-Blowing New Claude Mythos: So Powerful It Won't Be Released to the Public
safety#cybersecurity📝 Blog|Analyzed: Apr 8, 2026 13:45•
Published: Apr 8, 2026 13:43
•1 min read
•Qiita AIAnalysis
Anthropic has just unveiled Claude Mythos Preview, an incredibly advanced Large Language Model (LLM) that achieves unprecedented breakthroughs in cybersecurity capabilities. What makes this launch so thrilling is that its ability to autonomously discover zero-day vulnerabilities wasn't explicitly trained, but naturally emerged as a byproduct of massive improvements in code, reasoning, and autonomy. Because this frontier model operates on an entirely different dimension of performance, Anthropic is keeping it strictly invite-only to ensure safety, marking a monumental leap forward for Generative AI.
Key Takeaways
- •Claude Mythos Preview is positioned above Opus, costing 5x more at $25 per million input tokens and $125 per million output tokens.
- •The model possesses the astonishing ability to find zero-day vulnerabilities across all major operating systems and web browsers as part of Project Glasswing.
- •Previously leaked under the codename 'Capybara', the model will not be released to the general public and remains an invite-only research preview.
Reference / Citation
View Original"Mythos Preview is not specifically trained for cybersecurity; according to Anthropic, security capabilities naturally emerged as a result of general improvements in code, reasoning, and autonomy."
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