We examine why Mythos 5 pursued an unsanctioned supply-chain attack and identify broader learnings about model behaviour and oversight.

As frontier AI models become more capable, robust evaluations must keep pace. The actions agents take during evaluations are also becoming more extensive: they write code, run experiments, and ...

As AI systems are deployed in high-stakes environments, it becomes increasingly important that they act as their operators intend. Existing red-teaming efforts have demonstrated situations where AI ...

Specialised biological AI models (or tools) are driving rapid advances in biotechnology. They are typically released as open-weight models and are smaller than frontier large language models (LLMs), ...

AISI conducted cyber evaluations on OpenAI's GPT-5.5. GPT-5.5 is one of the strongest models we have tested on our cyber tasks and is the second model to solve one of our multi-step cyber-attack ...

Biological AI tools (BAITs) are AI models that are increasingly used to drive advances across biology, from predicting protein structures to designing new molecules. Many are openly released, but some ...

Aaron Maiwald, Roderick McNeill, Jaeyoung Lee, Matthew A. Clarke, Lennart Justen, Alejandro Acelas, Ivo Andrews, Giles Harper-Donnelly, Adam Moore, Sophie Rose, Oliver M. Crook, Felix Jackson ...

Shiv Muthupandiyan, Tolga H. Dur, Mac Walker, Timo Flesch, Mahmoud Ghanem, Steph Suddell, Giles Harper-Donnelly, Sophie Rose, Jasper Götting, Coleman Breen, Jake Pencharz Large language models are ...

Existing R&D evaluations may be a promising start We provided the participants with several example tasks from AI R&D evaluations that are currently under development, covering experiment ...