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AISI Evaluates GPT-5.5's Cyber Capabilities

·2026.05.01 08:03

Key point

AISI assessed GPT-5.5's cyber capabilities as similar to Claude Mythos.

Details

The UK's AI Security Institute(AISI) evaluated the cyber capabilities of OpenAI GPT-5.5.

The results were largely similar to the previously evaluated Claude Mythos. However, GPT-5.5 differs in that it is currently publicly available, meaning it can be used right away.

openaievaluationcybersecuritygpt-5.5
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