The Half-Life of AI Citations

How quickly citations vanish, which models retain them longer, and which domains stick. Answer pages, reference facts, and live trackers drawn from this study.

Published 2026-04-22T08:00:00Z Updated 2026-03-30 Study 00912 answers 8 facts 2 trackers

Featured answer

/ The highest-signal page in this cluster

How long do AI citations last? An analysis of the lifespan of AI citations based on the study The Half-Life of AI Citations. Open answer

Source & coverage

/ What powers this hub

• Study: Study 009
• Published: 2026-04-22T08:00:00Z
• Updated: 2026-03-30
• Author: Mack Grenfell
• Source and methodology: This hub is derived from The Half-Life of AI Citations and groups the answer pages, reference facts, and trackers that can be cited independently.
• Flagship study: The Half-Life of AI Citations
• Machine-readable data: JSON payload
• Citation targets: Source study and JSON stay publicly linked so crawlers can verify the page quickly.
• Trust signal: The answer, source study, and machine-readable JSON all point to the same claim set so crawlers do not need to infer provenance.

Answer Pages

/ Narrow questions answered directly from the study.

• What does a 31-day brand half-life actually mean?
  It means brand-level AI presence tends to halve from its peak within about a month. The study’s average brand half-life is 31 days.
  Answer

• Are most AI citations one and done?
  Yes. 73.5% of citation URLs in the study appear once and never return.
  Answer

• How many brands have truly stable AI visibility?
  Very few. Only 13.2% of brands in the stability analysis qualify as very stable.
  Answer

• How fast can AI visibility drop after a peak?
  Very fast. 47.1% of brands halve within 7 days, and average weekly mention change reaches 51.8% in the study.
  Answer

• Is AI visibility more volatile than traditional search rankings?
  Yes in practice. The decay benchmark shows immediate URL churn, a 31-day brand half-life, and large day-to-day movement, all of which point to a much more fluid surface than classic static rankings.
  Answer

• What is the right refresh cadence if citations decay this fast?
  The cadence has to be tighter than most editorial calendars assume. When the median citation lasts 0 days and the average brand half-life is 31 days, quarterly reaction loops are too slow.
  Answer

• Does a citation win mean you have a durable position?
  Usually no. A one-time citation win is often ephemeral because most citations vanish quickly and only 6.8% are still active at the end of the observation window.
  Answer

• What is the most important metric in the decay study?
  The combination of one-and-done rate and brand half-life is the clearest operating pair. Together they show how weak URL persistence can still translate into a slower but real brand-level decay curve.
  Answer

• Why should brands monitor AI visibility continuously?
  Because the underlying citation layer is highly unstable. Fast URL churn and steep brand-level decay mean snapshot reporting can miss both losses and recovery windows.
  Answer

• What does the decay data say about brand resilience?
  It says resilience is rare and earned. Only 13.2% of brands qualify as very stable, while the majority experience moderate to high volatility.
  Answer

• How should teams interpret short-lived citation spikes?
  Interpret them cautiously. A spike can be real and still fail to persist because most citations are one-and-done and the median URL lifespan is 0 days.
  Answer

Reference Facts

/ Short, quotable claims with metrics and methodology context.

• Nearly three quarters of citations appear once and vanish
  An analysis of 108,650 distinct citation URLs tracked longitudinally in The Half-Life of AI Citations study reveals the volatility of AI generated references.
  Fact

• The median citation lifespan is 0 days
  In The Half-Life of AI Citations study, researchers analyzed the persistence of AI-generated citations and found that the majority disappear immediately upon subsequent queries.
  Fact

• The average citation lifespan is only 6.8 days
  The Half-Life of AI Citations study evaluated the longevity of source links by measuring the average URL lifespan across a sample dataset.
  Fact

• Brand-level AI presence halves in about 31 days
  Brand presence decays more slowly than individual URLs, but still quickly.
  Fact

• Nearly half of brands halve within a week
  Fast decay is common, not exceptional.
  Fact

• Only 13.2% of brands are very stable
  An analysis of brand stability within AI citations reveals that a small minority of brands maintain consistent visibility over time.
  Fact

• Only 6.8% of citations are still active at the end of the window
  Persistence is the exception rather than the rule.
  Fact

• Weekly mention change exceeds 50% in the benchmark
  The surface is highly dynamic week to week.
  Fact

Trackers

/ Live benchmark views built from the study’s most reusable dimensions.

• Citation persistence benchmark
  Research tracker page for The Half-Life of AI Citations study, focusing on the Citation persistence benchmark.
  Tracker

• Visibility stability by brand cohort
  Research tracker page for Trakkr detailing the study The Half-Life of AI Citations, focusing on visibility stability by brand cohort.
  Tracker