Google Ads is launching AI Max for Search campaigns in open beta on May 27, 2025 via the UI. Full API support comes with v21 in August 2025.
Key Points:
– AI Max groups features like ACA, campaign-level broad match, and brand inclusions/exclusions.
– Enabling/disabling AI Max in the UI can break compatibility with older API versions.
– Errors may occur if you manage ACA or brand lists via API after toggling AI Max in the UI.
Current API (v19) works only if AI Max hasn’t been used on that campaign.
v21 will fully support AI Max, and legacy features will be deprecated soon after.
Recommendation: Hold off on using AI Max in the UI for API-managed campaigns until v21 is live.
