B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
18%
18% -- ranking longevity reduction for AI-only content (2026)
AI-only content has 18 to 35% lower ranking longevity compared to human-edited AI content.
- Reported as a range (18 to 35%)
Attribution:
View source
Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
18%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Marketing LTB
Primary
Tier C
https://www.heyy.io/blog/chatgpt-for-marketing ↗
Source Article
12 Ways to Use ChatGPT for Marketing in 2026
12 Ways to Use ChatGPT for Marketing in 2026
I’ll tell you a simple truth, every marketing team in 2026 is using ChatGPT. The ones using it well are producing work that sounds like them, moves fast, and converts. The ones using it badly are publishing content that reads like a committee wrote it aft…
Original Research
Marketing LTB
· Original study ↗
Methodology
Range 18-35%; midpoint used. Cited from Marketing LTB's 2026 ChatGPT statistics
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
AI-only content: 18% ranking longevity reduction. Source: Marketing LTB (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/ai-content-ranking-longevity-2026
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<blockquote cite="https://lighthousedata.io/data/ai-content-ranking-longevity-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>18%</strong> -- ranking longevity reduction for AI-only content<br><small>Source: Marketing LTB (2026) · <a href="https://lighthousedata.io/data/ai-content-ranking-longevity-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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