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OpenAI's GPT-5.5-Cyber beats Anthropic's banned Mythos model on cybersecurity benchmark

OpenAI's GPT-5.5-Cyber beats Anthropic's banned Mythos model on cybersecurity benchmarkDecrypt

OpenAI's GPT-5.5-Cyber scored 85.6% on CyberGym, outperforming Anthropic's Mythos 5 (83.8%) and Opus 4.7 (73.1%). The model is released under the Daybreak program with controls, while Mythos was pulled offline by a US government export ban.

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Jun 23, 6:59 PM
OpenAI's GPT-5.5-Cyber beats Anthropic's banned Mythos model on cybersecurity benchmark — AIBriefs