Semrush Releases 2026 AI Visibility Index, Revealing Its First UK Benchmark
At Spotlight London, Semrush presented the latest edition of its 2026 AI Visibility Index, adding a first UK benchmark comparing how ChatGPT, Gemini and Google AI Mode surface brands and sources in Britain and the US. AI platforms agree less in the UK, and strong results on one platform do not reliably carry over to others.
What the article says
On October 13, 2026, Semrush, an Adobe company, presented at Spotlight London a new edition of its 2026 AI Visibility Index, which for the first time compares how the major AI platforms surface brands and sources in the UK and the US. Its conclusion is that there is no single global approach to AI visibility.
The analysis covers January to July 2026, with 2.5 million UK prompts and 25 million US prompts per month, across ChatGPT, Gemini and Google AI Mode, plus Google AI Overviews results. The platforms overlap less in the UK (63 to 70 shared brands out of 100) than in the US (70 to 78). News sites account for 29.5% of ChatGPT's citations among the top 100 UK domains, versus 19.6% in the US. Fewer than half of the most-mentioned brands also appear among the most-cited domains. Semrush recommends measuring each platform separately.
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