Closed Frontier Cyber AI vs Open Defensive Tools: Real-World Comparison 2026
Originally published on NextFuture As of May 2026, Anthropic's Mythos and OpenAI's GPT-5.5-Cyber sit behind allowlists that most engineering teams will never clear. Meanwhile, Llama Guard 3, CodeLlama Guard, and Cisco AI Defense have been in production for months—no NDAs, no federal vetting, no undi
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