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AI cybersecurity updates for MDASH, Mythos, and GPT-5.5.
On Wednesday, the AISI, which evaluates AI models for the British government, said both Anthropic’s Claude Mythos Preview and OpenAI’s GPT-5.5 showed progress well above previous trends on cybersecurity testing. Separately, XBOW released data suggesting “frontier models have taken a major step forward in vulnerability discovery.”
Meanwhile, Microsoft said its multi-model agentic setup, MDASH, was used to discover 16 CVEs in this week’s Patch Tuesday updates and is the leader on the CyberGym security evaluation framework.
Image: AISI
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