AI Search Citations Fall 86% in Days, Google Spam Update Barely Moves Rankings
The data suggests Google's August spam update had little effect on traditional rankings while AI search citation structures shifted dramatically in the same window, and the company notes this change sits outside Google's own measurement tools.
Reporting from 1 source: ASCII.jp.
Itera Inc. released its August 2026 LLMO/AIO Trend Report on September 8. The report says citation share for a specific platform in ChatGPT search fell from 3.83% to 0.52%, a drop of approximately 86%, during Google's spam update period. Ranking fluctuations stayed near the major threshold. The report is free in PDF format.
Itera Inc., which operates the AI search citation measurement SaaS LLMO Checki, published its monthly survey report on September 8. The company compiles the report from its own measured data and public information from Japan and abroad.
The report frames August 2026 as a month where discussion volume and actual damage were reversed. Google's spam update, deployed from August 18 to 21, kept domestic ranking fluctuations near the major threshold. During that same period, citation share for a specific platform in ChatGPT search dropped from 3.83% to 0.52%, an approximate 86% loss. The company describes the change in citation structure as two orders of magnitude larger than the ranking fluctuations.
Itera also flags that the Search Console AI performance report malfunctioned from August 13 to 17, contaminating the pre-update baseline. The full PDF is available for free download from the company's website.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.