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OpenAI's GPT-5.5 Cyber AI Beats Anthropic's Banned Mythos Model—And Nobody's Shutting It Down

Decrypt · Jun 23, 2026, 6:59 PM · Also reported by 3 other sources

GPT-5.5-Cyber tops the CyberGym leaderboard as Anthropic's best models sit offline under a Trump administration export ban.

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Hacker News Ask HN: Anthropic banned me from using Claude Code and I don't know what to do NY Times N.S.A. Lost Access to Powerful A.I. Model Amid Anthropic Dispute Investing.com NCC Group joins OpenAI cyber security partner program

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OpenAI's GPT-5.5 Cyber AI Beats Anthropic's Banned Mythos Model—And Nobody's Shutting It Down

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