AI models favor familiar brands in search: Study
Artificial intelligence is fundamentally reshaping how consumers seek information, compare products, and make buying decisions online. As search engines evolve from simple index-matching systems into conversational AI platforms, digital marketers and SEO professionals face a critical question: how do large language models (LLMs) choose which brands to evaluate when formulating an answer? A comprehensive research study conducted by geoSurge reveals a striking reality about modern AI engines. When AI models execute background searches to gather live information—a process known as “fan-out” searching—they overwhelmingly favor brands they already recognize. Rather than evaluating the market with complete neutrality, AI models actively seek out established, familiar names at a significantly higher rate than lesser-known competitors. This empirical study sheds light on the internal biases of AI search engines, demonstrating that pre-existing model memory directly shapes dynamic search behavior. For brand strategists, enterprise marketers, and SEO specialists, these findings offer essential insights into how AI-driven discovery works and what is required to win visibility in an AI-first world. Understanding Model Memory vs. Live Search Behavior To evaluate how AI assistants determine what to search for, researchers at geoSurge designed an experiment that measured two distinct components: parametric memory (what the AI model already knows from its training data) and dynamic retrieval behavior (what the model chooses to search for on the live web when answering user queries). In conversational search, when a user asks a complex commercial prompt—such as “What are the best enterprise CRM solutions for scaling tech companies?”—the underlying AI model does not simply write a response from memory. Instead, it generates multiple background web queries behind the scenes. These secondary, automated queries are known as fan-out searches. They allow the AI to fetch fresh data, confirm real-time facts, and pull in current user reviews before presenting a final synthesis to the user. The study sought to determine whether an AI model’s internal memory exerts a systemic bias on these fan-out queries. The results proved that an AI model’s existing memory heavily dictates where it looks for answers online. Key Findings: The 3.2x Familiarity Advantage Across the entire dataset, researchers discovered that AI models searched for familiar brands 3.2 times more often than unfamiliar brands. When an AI model encountered commercial prompts, it initiated fan-out queries for familiar brands 55.7% of the time. In stark contrast, brands that fell outside the model’s top 10 familiar entities were only searched for 17.4% of the time. This vast disparity reveals that established brands enjoy an implicit advantage before an AI search even concludes. If an AI engine already holds a strong memory representation of a company, it actively seeks out updated information regarding that brand while building its final response. The research highlighted several critical patterns in how AI models construct their search parameters: Non-branded searches dominate overall query generation: The majority of fan-out queries executed by AI models were non-branded categorical searches. In fact, only 31% of all fan-out searches contained an explicit company or brand name. Brand-specific queries favor top-tier entities: When an AI model did decide to include an explicit brand name in a background search query, 63% of those targeted searches involved one of its top five most familiar brands. Parametric memory shapes active retrieval: While models use live web searches to supplement their knowledge, their internal “memory bank” heavily influences which specific entities are selected for live investigation. Inside the Dataset: How the Study Was Conducted The geoSurge study analyzed performance across thousands of synthetic consumer interactions. To ensure rigorous statistical sampling, researchers established a comprehensive testing environment designed to mimic authentic commercial queries across the United States market. The dataset was compiled using the following parameters: Timeframe: Data was systematically collected and evaluated between May 29 and June 9. Prompts Tested: A suite of 66 realistic U.S. buyer questions was used to trigger natural buying conversations. Testing Frequency: Each individual prompt was run 60 times across the testing window to eliminate single-response anomalies and capture variance in model output. Total Scope: The research team evaluated a total of 3,960 model responses, which generated 13,281 individual fan-out searches and yielded 1,416 brand-level observations. While the study authors noted that these findings demonstrate a strong observational correlation rather than definitive causation, the empirical evidence clearly shows that strong internal model memory heavily correlates with increased background search frequency. Industry Breakdown: How Bias Varies Across Verticals The research examined buyer behavior and model responses across nine distinct commercial sectors. Across every industry evaluated, familiar brands consistently outperformed unfamiliar brands in search execution, though the degree of bias varied by sector. Across the vertical markets, AI models searched for familiar brands 41% to 82% of the time, whereas unfamiliar brands were searched for just 9% to 23% of the time. The nine industries analyzed in the report included: Travel Automotive Finance Business Software Education Food and Restaurants Luxury Fitness and Wellness Fashion The researchers noted that certain specialized industries had smaller sample sizes within the study, with some sectors represented by as few as six specific prompts. Nevertheless, the general trend remained remarkably uniform across every market segment: recognizable industry leaders are far more likely to be actively looked up by AI engines during a buying query than emerging competitors. Exceptions to the Rule: The Power of Live Web Retrieval Although model memory creates a significant advantage for market incumbents, it does not act as an absolute barrier to entry. The study highlighted that dynamic real-time retrieval mechanisms can still surface unfamiliar brands under the right conditions. During testing, researchers observed a compelling outlier involving Google Gemini. While answering a user query regarding online payment providers, Gemini initiated a live fan-out search specifically for Lemon Squeezy—a newer merchant-of-record payment platform. Crucially, Lemon Squeezy was completely absent from Gemini’s pre-measured parametric memory for that category. This exception demonstrates that live search engines integrated into generative AI models retain the capability to discover and pull in unfamiliar brands. When an unmapped brand possesses high context relevancy, strong topical authority, or fresh web coverage