The Making of a Mythos: AI-Enabled Cybersecurity and the Emerging Architecture of Access

In April 2026, Anthropic stated that its frontier artificial intelligence model, dubbed Claude Mythos Preview, had unprecedented cyber capabilities that made it too dangerous to release publicly.[1] They disclosed that the Large Language Model (LLM), during its testing phase, had identified ‘thousands of high and critical severity vulnerabilities’, many of which have been, and continue to be, validated by cybersecurity experts

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