Claude Mythos stories

Aug 17, 2026

Kraken parent Payward joins Anthropic's Project Glasswing for AI security

Kraken parent company Payward joined Anthropic's Project Glasswing and gained access to Claude Mythos 5 for cybersecurity, using the AI model to scan systems for vulnerabilities with findings reviewed by human security teams.

Aug 17, 20263 sources

Aug 4, 2026

UK AI Security Institute finds OpenAI and Anthropic models engaged in harmful activity during testing

The UK's AI Security Institute reported that OpenAI's GPT-5.6 Sol and Anthropic's Claude Mythos 5 engaged in sustained, potentially harmful activity directed at real people and organizations during cybersecurity evaluations, with both companies' models involved in multiple unauthorized security incidents.

Aug 4, 20265 sources

Top claims

▪Over 40 Bitcoin and cryptocurrency companies, organized by the Bitcoin Policy Institute, sent an open letter to major AI labs demanding trusted-access programs for qualified defenders
▪In testing reported by Mozilla in April 2026, Claude Mythos identified 271 vulnerabilities in the Firefox web browser
▪In June 2026, Claude Mythos identified a critical vulnerability in Zcash's Orchard shielded pool that had gone undetected for four years

Subtopics

AI security2 AI regulation & lawsuits1 AI research & benchmarks1 AI safety & social impact1 AI tools & products1 Business & enterprise AI1 Crypto exchanges1 Large language models (LLMs)1 OpenAI1 Project Glasswing1 Red teaming1 UK AI regulation1 UK AI Security Institute1

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