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OpenAI just launched GPT-5.4-Cyber, a “cyber-permissive” variant of its flagship GPT-5.4 model built specifically for defensive cybersecurity work. The release comes exactly one week after Anthropic unveiled its own cybersecurity-focused model, Mythos, signaling that the race to build AI-powered security tools has become the newest battleground between the two leading AI companies. But where Anthropic … Read more