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simon_willison ยท Apr 30, 2026 ยท news

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Our evaluation of OpenAI's GPT-5.5 cyber capabilities

simonwillison.netApr 30, 2026
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Our evaluation of OpenAI's GPT-5.5 cyber capabilities The UK's AI Security Institute previously evaluated Claude Mythos : now they've evaluated GPT-5.5 for finding security vulnerability and found it to be comparable...

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