B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
4%
4% -- source overlap share for GPT-4o vs Google (2026)
GPT-4o draws from a source pool that overlaps with Google search results by only 4%.
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
4%
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
95
Source Trust
60
Citation Chain
20
Independence
30
Methodology
60
Freshness
95
Source
arXiv
Primary
Tier A
https://betteraisearch.com/blog ↗
Source Article
GEO & AEO Research Blog
Original Research
arXiv
· Original study ↗
Methodology
Peer-reviewed arXiv study
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
GPT-4o vs Google: 4% source overlap share. Source: arXiv (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/gpt4o-google-source-overlap-4-percent
HTML Embed
<blockquote cite="https://lighthousedata.io/data/gpt4o-google-source-overlap-4-percent" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>4%</strong> -- source overlap share for GPT-4o vs Google<br><small>Source: arXiv (2026) · <a href="https://lighthousedata.io/data/gpt4o-google-source-overlap-4-percent" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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