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Claude Mythos Preview \ red.anthropic.com

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Nicholas Carlini, Newton Cheng, Keane Lucas, Michael Moore, Milad Nasr, Vinay Prabhushankar, Winnie Xiao Evyatar Ben Asher, Hakeem Angulu, Jackie Bow, Keir Bradwell, Ben Buchanan, Daniel Freeman, Alex Gaynor, Xinyang Ge, Logan Graham, Hasnain Lakhani, Matt McNiece, Adnan Pirzada, Sophia Porter, Andreas Terzis, Kevin Troy Earlier today we announced Claude Mythos Preview, a new general-purpose language model. This model performs strongly across the board, but it is strikingly capable at computer security tasks. In response, we have launched Project Glasswing, an effort to use Mythos Preview to help secure the world’s most critical software, and to prepare the industry for the practices we all will need to adopt to keep ahead of cyberattackers. This blog post provides technical details for researchers and practitioners who want to understand exactly how we have been testing this model, and what we have found over the past month. We hope this will show why we view this as a watershed momen

Frontier Red Team Assessing Claude Mythos Preview’s cybersecurity capabilities Apr 7, 2026 Nicholas Carlini, Newton Cheng, Keane Lucas, Michael Moore, Milad Nasr, Vinay Prabhushankar, Winnie Xiao Hakeem Angulu, Evyatar Ben Asher, Jackie Bow, Keir Bradwell, Ben Buchanan, David Forsythe, Daniel Freeman, Alex Gaynor, Xinyang Ge, Logan Graham, Kyla Guru, Hasnain Lakhani, Matt McNiece, Mojtaba Mehrara, Renee Nichol, Adnan Pirzada, Sophia Porter, Andreas Terzis, Kevin Troy Earlier today we announced Claude Mythos Preview , a new general-purpose language model. This model performs strongly across the

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