Google Adds Multi Campaign A/B Testing to AI Max in September
Google announced on August 20, 2026 on its Ads & Commerce Blog that it is adding new testing and planning tools to AI Max in Google Ads. The post is written by Brandon Ervin, Director of Product Management, Search Ads. Everything below comes from that first party announcement.
Transcript
Today Google is adding new testing and planning tools to AI Max in Google Ads.
AI Max already had one click experiments. Google is adding one test that compares budgets and return targets across multiple Search campaigns. Google says it arrives in September.
Brand and location controls can now stay enabled during AI Max experiments. Performance Planner now previews how bidding or budget changes may affect campaigns. Suggestions apply in one click.
This is Google's own announcement about its own advertising products. No pricing, no advertiser results, no independent verification. Google gives no availability date for the two current changes.
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Sources
Every claim in this video comes from the top ranking coverage of this topic. The claims and where each one came from:
- Building on the one-click experiments in AI Max(Google's official announcement, Make AI Max work for your business with new testing and planning tools.)
- we're now introducing a way for you to test different budgets and ROI targets across multiple Search campaigns in a single A/B test(Google's official announcement, Make AI Max work for your business with new testing and planning tools.)
- Rolling out in September(Google's official announcement, Make AI Max work for your business with new testing and planning tools.)
- If you rely on specific brand or location controls, A/B testing just got simpler.(Google's official announcement, Make AI Max work for your business with new testing and planning tools.)
- New capabilities in AI Max experiments now let you run tests with these settings enabled(Google's official announcement, Make AI Max work for your business with new testing and planning tools.)
- Performance Planner now allows you to see how changes, like bidding or budget targets, may impact your existing campaign performance.(Google's official announcement, Make AI Max work for your business with new testing and planning tools.)
- In one click, you can apply those suggested changes directly to your campaigns.(Google's official announcement, Make AI Max work for your business with new testing and planning tools.)