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ChatGPT 5.5 > Claude Mythos
You can access chatGPT 5.5 today. It looks like the most powerfull AI model for CyberSecurity yet. Even better than Claude Mythos.
GPT-5.5 completed TLO end-to-end in 2 of 10 attempts, making it the second model to do so. Mythos Preview, the first model to solve TLO, did so in 3 of 10 attempts.
On the Expert-level tasks, GPT-5.5 achieves an average pass rate of 71.4% (±8.0%, 1 standard error of the mean), compared to 68.6% (±8.7%) for Mythos Preview, 52.4% (±9.8%) for GPT-5.4, and 48.6% (±10.0%) for Opus 4.7. On this measure, GPT-5.5 may be the strongest model we have tested.
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ChatGPT 5.5 > Claude Mythos
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