UK AI Security Institute
1 article tagged with UK AI Security Institute
April 30, 2026
benchmarkOpenAI
UK AI Security Institute finds GPT-5.5 matches Claude Mythos in vulnerability detection, but is publicly available
The UK's AI Security Institute has evaluated OpenAI's GPT-5.5 for security vulnerability detection capabilities. The evaluation found GPT-5.5 performs comparably to Anthropic's Claude Mythos, with the key distinction that GPT-5.5 is generally available while Mythos remains in limited release.