B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
40%
40% -- median reference completeness for consumer LLMs (Gemini, DeepSeek, Llama, ChatGPT, Grok) (2026)
In a 2026 BMJ Open audit of five consumer LLMs across 250 prompts, the median reference completeness of the answers was 40%.
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
40%
Unit
Percentage
Data Vintage
2026
Entity
Sample Size
250
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
BMJ Open
Primary
Tier A
https://alhena.ai/blog/ai-health-supplement-brands-compliance-support/ ↗
Source Article
AI for Supplement Brands: Compliance Support at Scale
Original Research
BMJ Open
· Original study ↗
Methodology
BMJ Open peer-reviewed audit of five consumer LLMs
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
consumer LLMs (Gemini, DeepSeek, Llama, ChatGPT, Grok): 40% median reference completeness. Source: BMJ Open (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/bmj-open-llm-reference-completeness-2026
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<blockquote cite="https://lighthousedata.io/data/bmj-open-llm-reference-completeness-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>40%</strong> -- median reference completeness for consumer LLMs (Gemini, DeepSeek, Llama, ChatGPT, Grok)<br><small>Source: BMJ Open (2026) · <a href="https://lighthousedata.io/data/bmj-open-llm-reference-completeness-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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