🦄 Startups & VC 19h ago · Ana Maria Constantin

OpenAI opens its cybersecurity model to thousands of defenders in race with Anthropic’s Mythos

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OpenAI opens its cybersecurity model to thousands of defenders in race with Anthropic’s Mythos
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In short: OpenAI is releasing GPT-5.4-Cyber, a model fine-tuned for defensive cybersecurity with lowered refusal boundaries and binary reverse engineering capabilities, and scaling its Trusted Access for Cyber programme to thousands of verified defenders. The move comes a week after Anthropic restricted its more powerful Mythos model to just 11 organisations, setting up a philosophical […]
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