what is a geo score and how is it calculated?
A GEO Score measures how visible your brand is across AI search engines, expressed as a 0 to 100 composite of citation rate, share of voice, sentiment, and answer-position weighting. OnyxRank calculates it across ChatGPT, Perplexity, Claude, Gemini, and Google AI Mode using a daily query panel of 50 to 500 prompts per brand. Scores above 60 indicate strong AI presence; below 30 signals you are losing share to competitors. The score updates daily and decomposes by engine and topic cluster.
Evidence and detail
- GEO Score combines four sub-metrics: citation rate, share of voice, sentiment score, and answer-position weight per engine.
- OnyxRank runs 50 to 500 prompts per brand daily across five engines for a stable rolling baseline.
- A score above 60 correlates with measurable referral traffic from AI search in our 2026 client cohort.
- Decomposition by engine reveals platform-specific gaps; most brands score 30 points higher on one engine than another.
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