Recent signals
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OpenAI's new GPT-5.5-Cyber tops Claude Mythos 5 in vulnerability benchmark
Neowin
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OpenAI launches new initiative to help find and patch open-source bugs
TechCrunch
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OpenAI: Yoo-hoo, look over here, we do that security stuff too!
The Register
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OpenAI Launches Full-Scale Effort to Patch Open-Source Bugs as It Takes on Anthropic’s Mythos
Wired