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    OpenAI's GPT-5.5 Matches Anthropic's Claude Mythos in Cybersecurity Tests

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    OpenAI's GPT-5.5 Matches Anthropic's Claude Mythos in Cybersecurity Tests

    Here's what it means for you.

    The competition between AI models is intensifying, promising enhanced cybersecurity solutions.

    What happened

    OpenAI's GPT-5.5 successfully matched the performance of Anthropic's Claude Mythos in cyberattack simulations conducted by the UK AI Security Institute.

    The Context

    • GPT-5.5 is now available in ChatGPT and through API, while Claude Mythos is limited to a small group of users.
    • Advancements in AI models are enhancing their capabilities in cybersecurity.
    • The cyber threat posed by these models is not unique to any single model.

    Takeaway

    The ongoing development of AI models like GPT-5.5 and Claude Mythos could reshape the landscape of cybersecurity solutions.

    This article was generated by AI from 3 verified sources and reviewed by A47 editorial systems.

    3 Articles
    Ars Technica — All

    GPT-5.5 matches heavily hyped Mythos Preview in new cybersecurity tests

    Recent cybersecurity tests indicate that OpenAI's GPT-5.5 has matched the performance of Anthropic's highly anticipated AI model, Mythos, suggesting that the cyber threat posed by Mythos is not unique to a single model.

    Ars Technica

    GPT-5.5 matches heavily hyped Mythos Preview in new cybersecurity tests

    Recent cybersecurity tests indicate that OpenAI's GPT-5.5 has matched the performance of Anthropic's highly anticipated AI model, Mythos, suggesting that the cyber threat posed by Mythos is not unique to a single model.

    THE DECODER

    GPT-5.5 matches Claude Mythos in cyber attack tests, UK AI Security Institute finds

    OpenAI's GPT-5.5 has been evaluated by the UK AI Security Institute and found to match the performance of Anthropic's Claude Mythos in cyber attack simulations, marking it as the second AI model capable of autonomously solving such complex scenarios.

    Techmeme

    Cybersecurity analysis: GPT-5.5 reaches a similar level of performance as Mythos Preview and is the second model to solve a multi-step cyberattack simulation (AI Security Institute)

    A recent evaluation by the AI Security Institute revealed that OpenAI's GPT-5.5 has achieved a performance level comparable to Anthropic's Mythos Preview, becoming the second AI model capable of solving a multi-step cyberattack simulation. This marks...