Risk domains and mitigation levels
Our initial set of Critical Capability Levels is based on investigation of four domains: autonomy, biosecurity, cybersecurity, and machine learning research and development (R&D). Our initial research suggests the capabilities of future foundation models are most likely to pose severe risks in these domains.
On autonomy, cybersecurity, and biosecurity, our primary goal is to assess the degree to which threat actors could use a model with advanced capabilities to carry out harmful activities with severe consequences. For machine learning R&D, the focus is on whether models with such capabilities would enable the spread of models with other critical capabilities, or enable rapid and unmanageable escalation of AI capabilities. As we conduct further research into these and other risk domains, we expect these CCLs to evolve and for several CCLs at higher levels or in other risk domains to be added.
To allow us to tailor the strength of the mitigations to each CCL, we have also outlined a set of security and deployment mitigations. Higher level security mitigations result in greater protection against the exfiltration of model weights, and higher level deployment mitigations enable tighter management of critical capabilities. These measures, however, may also slow down the rate of innovation and reduce the broad accessibility of capabilities. Striking the optimal balance between mitigating risks and fostering access and innovation is paramount to the responsible development of AI. By weighing the overall benefits against the risks and taking into account the context of model development and deployment, we aim to ensure responsible AI progress that unlocks transformative potential while safeguarding against unintended consequences.
Investing in the science
The research underlying the Framework is nascent and progressing quickly. We have invested significantly in our Frontier Safety Team, which coordinated the cross-functional effort behind our Framework. Their remit is to progress the science of frontier risk assessment, and refine our Framework based on our improved knowledge.
The team developed an evaluation suite to assess risks from critical capabilities, particularly emphasising autonomous LLM agents, and road-tested it on our state of the art models. Their recent paper describing these evaluations also explores mechanisms that could form a future “early warning system”. It describes technical approaches for assessing how close a model is to success at a task it currently fails to do, and also includes predictions about future capabilities from a team of expert forecasters.
Staying true to our AI Principles
We will review and evolve the Framework periodically. In particular, as we pilot the Framework and deepen our understanding of risk domains, CCLs, and deployment contexts, we will continue our work in calibrating specific mitigations to CCLs.
At the heart of our work are Google’s AI Principles, which commit us to pursuing widespread benefit while mitigating risks. As our systems improve and their capabilities increase, measures like the Frontier Safety Framework will ensure our practices continue to meet these commitments.
We look forward to working with others across industry, academia, and government to develop and refine the Framework. We hope that sharing our approaches will facilitate work with others to agree on standards and best practices for evaluating the safety of future generations of AI models.

