AI Visibility Index Tracked Platform Citation Patterns
Data analysis reveals how major AI models distribute traffic and brand mentions across international markets.
Updated on Oct. 13, 2026 in Artificial Intelligence
Live Poll
Do you trust information provided by AI tools as much as traditional news or medical websites?
Semrush released its 2026 AI Visibility Index, tracking citation patterns for ChatGPT, Gemini, and Google AI services from January to July 2026. The study measured how these platforms distribute mentions across news, medical, and video streaming domains.
Why it matters
Understanding citation reliance is critical for businesses as AI-referred traffic shows a 60% higher conversion rate than traditional sources. This index highlights the shifting landscape of search-based discovery and brand visibility in the age of generative models.
Semrush analyzed 2.5 million UK prompts and 25 million US prompts monthly across 22 industry categories. Findings show that while Gemini names more distinct brands per answer than ChatGPT, fewer than half of the top 100 mentioned brands appear in the top 100 cited domains.
The players
Semrush
A digital marketing software provider that tracks search engine results, brand visibility, and competitor analytics.
ChatGPT
A generative AI platform developed by OpenAI that functions as a conversational search and task-assistance tool.
Gemini
A multimodal AI model suite and conversational assistant developed by Google.
The details
The index tracked citations by observing which domains were surfaced by ChatGPT, Gemini, Google AI Mode, and Google AI Overviews. Google AI Overviews favored medical reference sites and video streaming platforms significantly more than other models. The study suggests that platform-specific citation behaviors are distinct, with any two platforms sharing only 63 to 70 of their top 100 mentioned brands in the UK market.
Timeline
January 2026 marked the start of the Semrush AI Visibility Index data collection.
April 2026 saw the launch of a brand visibility framework by Semrush.
July 2026 concluded the data collection period for the index.
The Tech Race
The Semrush AI Visibility Index provides a critical baseline for tracking how AI models are replacing traditional search referral pathways. It highlights a divergence in strategy between platforms like Gemini and ChatGPT, which are increasingly competing to become the primary gatekeepers of web traffic.
Companies can leverage these findings to optimize their digital presence, as AI-referred traffic currently correlates with a 60% higher conversion rate. Businesses should prioritize visibility in the specific domains preferred by Google AI Overviews and other top-cited platforms.
The takeaway
AI models are becoming central to traffic acquisition, with specific platforms exhibiting clear biases toward news or video domains. Marketing teams should monitor if these citation distributions shift as platforms update their indexing algorithms in late 2026.
Further reading
For more on the mechanics of machine-led discovery, explore our latest coverage in Artificial Intelligence.
Live Poll
Do you trust information provided by AI tools as much as traditional news or medical websites?
