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Paper detail

Code World Model Preparedness Report

This report documents the preparedness assessment of Code World Model (CWM), a model for code generation and reasoning about code from Meta. We conducted pre-release testing across domains identified in our Frontier AI Framework as potentially presenting catastrophic risks, and also evaluated the model's misaligned propensities. Our assessment found that CWM does not pose additional frontier risks beyond those present in the current AI ecosystem. We therefore release it as an open-weight model.

preprint2026arXivOpen access
Daniel SongPeter NeyCristina MenghiniFaizan AhmadAidan BoydNathaniel LiZiwen HanJean-Christophe TestudSaisuke OkabayashiMaeve RyanJinpeng MiaoHamza KwisabaFelix BinderSpencer WhitmanJim GustEsteban ArcauteDhaval KapilJacob KahnAyaz MinhasTristan GoodmanLauren DeasonAlexander VaughanShengjia ZhaoSummer Yue
Software EngineeringArtificial Intelligence
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Daniel SongPeter NeyCristina MenghiniFaizan AhmadAidan BoydNathaniel LiZiwen HanJean-Christophe TestudSaisuke OkabayashiMaeve RyanJinpeng MiaoHamza KwisabaFelix BinderSpencer WhitmanJim GustEsteban ArcauteDhaval KapilJacob KahnAyaz MinhasTristan GoodmanLauren DeasonAlexander VaughanShengjia ZhaoSummer Yue

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