B Evidence Grade B Graded accuracy verified by the review judge Safe to Cite Current

2,737

2,737 -- questions tested for ChatGPT, Perplexity and Claude (South African GEO study) (2026)

Name: Questions Tested Statistics
Creator: Lighthouse Intelligence
Published: 2026-09-29

2026 · n=43 · Algorithm Agency

Algorithm Agency tested 2,737 questions across ChatGPT, Perplexity, and Claude in a study of 43 South African brands.

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Attribution: Algorithm Agency View source

Lighthouse Research Team

Last verified: 2026-09-29 · How we verify data →

Source verified Evidence graded

Value

2,737

Unit

Count

Data Vintage

2026

Entity

ChatGPT, Perplexity and Claude (South African GEO study)

Sample Size

Evidence Quality

Strong, reliable evidence

Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.

61/100 confidence

Single source - not yet corroborated

Score breakdown

Extraction

Source Trust

Citation Chain

Independence

Methodology

Freshness

Source

Algorithm Agency Primary Tier B

https://www.algorithm.agency/blog/search-social-ai-why-you-need-all-three ↗

Confidence: 53/100 Vintage: 2026 Channel: Common Crawl

Source Article

Search, Social, AI: why you need all three (and what we actually sell)

Original Research

Algorithm Agency · Original study ↗

Methodology

Agency's own research testing real questions across AI platforms for 43 South African brands

Methodology documented

Segmentation

Industrymarketing

Cite this stat

Plain Text

ChatGPT, Perplexity and Claude (South African GEO study): 2,737 questions tested. Source: Algorithm Agency (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/algorithm-geo-study-questions-tested

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<blockquote cite="https://lighthousedata.io/data/algorithm-geo-study-questions-tested" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>2,737</strong> -- questions tested for ChatGPT, Perplexity and Claude (South African GEO study)<br><small>Source: Algorithm Agency (2026) · <a href="https://lighthousedata.io/data/algorithm-geo-study-questions-tested" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>

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