13 か月にわたる Claude の回答 20011 件のデータ調査:最も多く引用しているプラットフォーム、引用密度、そしてほかの 4 つの AI との違いを分析しました。

Claude was measured on 20011 answers over 13 months. Its most cited platform is Trustpilot at 1.57%, and it names on average 3.5 sources per answer, which places it fourth of the five models measured.
Claude cites the smallest and most selective set of sources of the five models, and it ignores several platforms the others rely on.
A citation rate of 2% means the source was cited twice for every 100 measured answers. Rates are computed per model against the number of answers of that model, so a model with a smaller sample never distorts a column. A source cited several times inside one answer is counted once per company block, which keeps a single verbose answer from dominating a month.
The distribution is worth as much as the ranking. The top three sources hold 63% of the citations counted in this table, 1 platform sits above 1%, and Trustpilot is cited 3.1 times more often than HubSpot. A market where three sources hold most of the citations rewards depth on those three rather than presence everywhere.
Citation density on Claude moved from 4.7 to 2.1 sources per answer over the period. The platforms it cites moved too: Trustpilot is now first at 1.57%.
Claude behaves like a careful analyst: fewer sources, more weight on specialised and professional references, and near indifference to community platforms. For a business, that means generic social proof does not travel here. What travels is domain specific documentation, professional directories in your field, and content that reads as expert rather than promotional. It is the hardest model to enter and the least noisy once you are in.
Every number on this page comes from the public Sorank dataset. The underlying figures, the monthly detail and the filters are available here:
Open the source data on data.sorank.com
Data updated on 2026-08-26.
This study is free to quote, in an article, a deck or a report. Please cite the source and the measurement period, because the numbers move every month.
Sorank (2026). Claude Citation Study: What Claude Cites in 20011 Measured Answers. Sorank GEO studies, measured on 301025 AI answers collected between August 2025 and August 2026. Available at https://www.sorank.com/data/claude-citation-study
The same panel, read from another angle:
This study describes a market. Sorank measures your site: which questions mention you, which mention someone else, and what to publish to change that, tracked weekly across the same five AI.
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Trustpilot(1.57%)がトップで、HubSpot(0.5%)、Amazon(0.49%)が続きます。完全なランキングはこのページにあり、元データは data.sorank.com で公開しています。
2025 年 8 月から 2026 年 8 月までに 5 つの AI から集めた 301025 件の回答をもとに、引用されたすべての情報源を抽出して正規化しました。引用率は、測定した回答 100 件あたりの引用数です。公開データセットは data.sorank.com にあります。
その期間、Claude におけるそのプラットフォームの引用率の測定値がゼロだからです。データの欠落ではなく実際の結果です。集めた回答の中で、モデルがそのプラットフォームを単に引用しなかったのです。
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