B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
24 hours
24 hours -- time for fabricated content to propagate to ai responses for ChatGPT and Google Gemini (2026-02)
Fabricated content published on a personal site propagated to ChatGPT and Google Gemini responses in less than 24 hours.
- Single-case experiment conducted by a BBC journalist
Attribution:
View source
Lighthouse Research Team
Last verified:
·
How we verify data →
Source verified
Evidence graded
Value
24 hours
Unit
Duration Hours
Data Vintage
2026-02
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
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
60
Freshness
95
Source
BBC
Primary
Tier B
https://www.tryhikoo.com/en/blog/guides/ai-response-manipulation-protect-brand-visibility-2026/ ↗
Source Article
Hikoo Blog | GEO & AI Visibility Resources
In February 2026, a BBC journalist showed that a simple blog post could make ChatGPT and Google Gemini repeat entirely fabricated information in less than 24 hours. The experiment reveals a critical vulnerability in AI engines. Anyone can influence what AI says about your brand, your products, or yo…
Original Research
BBC
· Original study ↗
Methodology
BBC journalist experiment (Thomas Germain), single-case experiment
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
ChatGPT and Google Gemini: 24 hours time for fabricated content to propagate to ai responses. Source: BBC (2026-02). Via Lighthouse Intelligence -- https://lighthousedata.io/data/ai-manipulation-propagation-hours
HTML Embed
<blockquote cite="https://lighthousedata.io/data/ai-manipulation-propagation-hours" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>24 hours</strong> -- time for fabricated content to propagate to ai responses for ChatGPT and Google Gemini<br><small>Source: BBC (2026-02) · <a href="https://lighthousedata.io/data/ai-manipulation-propagation-hours" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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