By Roger Montti
Publication Date: 2026-01-07 10:17:00
Google published a research paper about a new AI model for detecting fraud in the Google Ads system that’s a strong improvement over what they were previously using. What’s interesting is that the research paper, dated December 31, 2025, says that the new AI is deployed, resulting in an improvement in the detection rate of over 40 percentage points and achieving 99.8% precision on specific policies.
ALF: Advertiser Large Foundation Model
The new AI is called ALF (Advertiser Large Foundation Model), the details of which were published on December 31, 2025. ALF is a multimodal large foundation model that analyzes text, images, and video, together with factors like account age, billing details, and historical performance metrics.
The researchers explain that many of these factors in isolation won’t flag an account as potentially problematic, but that comparing all of these factors together provides a better understanding of advertiser behavior and intent.
They write:
“A core…