OpenAI shipped GPT-5.5-Cyber on June 22.
It scores 85.6% on CyberGym.
Anthropic's Mythos 5 sits at 83.8% — and is currently banned by the US government.
The gap is less than 2 points.
The context is everything.
OpenAI is distributing this model to a growing network of 25+ security partners thro...
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