Anthropic has responded to the draft report of the California Governor's Working Group on AI Frontier Models, welcoming their emphasis on transparency as a means to create a well-functioning AI policy environment. The company agrees that transparency can be a low-cost, high-impact way to grow the evidence base around new technologies and increase consumer trust. Anthropic adheres to industry best practices in its own responsible scaling policy, which includes publicly disclosing model testing results and performing third-party testing. However, the company believes that governments could play a constructive role in improving transparency in the safety and security practices of frontier AI companies, particularly by requiring them to have a safety and security policy and publicly document their tests. Anthropic looks forward to providing further feedback on the report and helping shape California's approach to frontier model safety.