The record
SISTRIX is a German SEO toolmaker whose 17-week, 1.5-million-snapshot study is the record's base rate for citation drift.
One item, and the record's base rate for citation drift: SISTRIX re-sampled 82,619 prompts weekly for 17 weeks — 1,548,213 snapshots across six countries and three surfaces — and found Google replacing 56% of its cited sources every week and ChatGPT as much as 74%, with a stable core of a few domains on 86% of prompts and 89% weekly rotation outside it. AI Overviews and AI Mode cited different domains 83% of the time; only 1.4% of cited news articles stayed permanently. Vendor-published and not replicated.
4 items on the wire, newest first. Elsewhere: official
Sistrix, which queries hundreds of thousands of prompts a day in logged-out ChatGPT, says answers switched to a new block-based format (sections, images…
Via Sistrix Blog ↗ · Oct 30 · · Tools & Vendors, AEO, Research
Sistrix analysed 10,826 daily measurement series from its own data, across four AI models and eight countries, and found that AI answers vary so much that…
Via Sistrix Blog ↗ · Oct 28 · · Research, AEO, Tools & Vendors
Sistrix compared 48,527 pages cited by ChatGPT, Google AI Mode and AI Overviews in the second quarter of 2026 against uncited pages on the same domain…
Via Sistrix Blog ↗ · Oct 22 · · Research, AEO, GEO
The largest public measurement of citation drift re-sampled 82,619 prompts weekly for 17 weeks, from December 17, 2025 to April 8, 2026, producing…
