Google documented a 1-click AI Max experiment recommendation that builds a 50/50 split test

Google added a section to its AI Max for Search FAQ describing a 1-click experiment recommendation. Eligible accounts find it on the Recommendations page, and selecting 'Create 1-click experiment automatically' sets up a 50/50 split test comparing the base Search campaign against an AI Max treatment arm with no manual configuration.

The same FAQ confirms granular controls when building an AI Max experiment from the Experiments tab: Search term matching and Asset optimization can be enabled or disabled for individual ad groups in the treatment arm, while the control arm keeps the base campaign settings.