The AI Visibility Index
What is the AI Visibility Index?
An open benchmark of how often the major AI engines name and cite brands in a category, scored on mention rate, citation rate and average position across six engines under neutral conditions.
An open benchmark of how often AI engines name and cite brands, by category. Published questions, a published method, six engines and neutral conditions, so anyone can check the numbers.
- Six engines, one fixed set of questions per category
- Method, questions and weightings published with every edition
- The raw evidence for any brand that asks for its own
Open methodology · CC BY 4.0 · Sophyx excluded from its own rankings
Edition one is being measured now
We won't publish numbers before we've run them. The method below is final and the first categories are being measured. Results go here when the run is done, with the full set of questions so anyone can repeat it.
Want your category in edition one, or your own brand scored today? The free analysis uses the same three measures on ChatGPT and Gemini:
Methodology
Published in full, so anyone can repeat it.
Prompt set
Each category gets a fixed set of buyer-intent prompts written the way a real purchaser would phrase them, no brand names in the prompt, because including one guarantees the mention we are trying to measure. The set is published with each edition so anyone can reproduce it.
Engines
Every prompt runs against all six engines: ChatGPT, Google Gemini, Google AI Overviews, Claude, Perplexity, Microsoft Copilot. Running a subset and calling it an index would bias the result toward whichever engine a brand happens to have optimised for.
Neutral conditions
No personalisation, no logged-in accounts, no location signals beyond a stated default. Personalised results are real for the individual user but useless as a comparable benchmark.
The score
A 0 to 100 composite of three measured quantities: mention rate (how often the brand is named), citation rate (how often the brand's own domain is cited in answers that name it), and average position among brands named in the same answer. Weightings are published with each edition rather than kept proprietary.
What we publish
The scores, the prompt set, the engine list, the run dates, and the weightings. Raw per-answer captures are retained so any brand can request the evidence behind its own score.
Conflict of interest
Sophyx sells AI visibility software and builds this Index. Sophyx does not appear in its own rankings. If a scored brand is a Sophyx customer, that is disclosed in the edition footnote rather than in the score.
Score your own brand on the same method
The free analysis uses the same three measures (mention rate, citation rate and position) on ChatGPT and Gemini, so your score sits on the same scale. You can also check one engine at a time:
Free Perplexity checker
One engine, no signup
Free Gemini & AI Overviews checker
One engine, no signup
Free Claude checker
One engine, no signup
Free Microsoft Copilot checker
One engine, no signup
Engines covered by the Index: ChatGPT, Google Gemini, Google AI Overviews, Claude, Perplexity, Microsoft Copilot.
AI Visibility Index FAQ
- An open benchmark of how often the major AI engines name and cite brands in a category. Each edition asks a fixed, published set of buyer questions on ChatGPT, Gemini, Google AI Overviews, Claude, Perplexity and Microsoft Copilot under neutral conditions, and scores each brand on mention rate, citation rate and average position.
- Scores only mean something inside a category, because categories differ a lot. A 40 in a crowded consumer category can be a stronger position than a 70 in a niche with three players. Compare yourself with the other brands in your category and with your own last score, not with a fixed number.
- A grader scores one brand you enter. An index measures a whole category on the same questions and publishes the comparison, so the numbers mean something next to each other. A grader tells you your score; an index tells you your rank.
- Yes. We keep the saved answers behind every score and will share the evidence for your own brand if you ask. A benchmark nobody can check isn't worth much.
- No. Sophyx builds the Index and sells AI visibility software, so we leave ourselves out of every category we score. If a ranked brand is a Sophyx customer, the edition says so in a footnote, and it doesn't affect the score.
- Every quarter. AI answers change weekly, so one snapshot tells you little; the value is in the trend across editions. If we can't keep that pace, we'll say so.
Where does your brand sit?
Free, no card. Your mention rate, citation rate and position on ChatGPT and Gemini: the same three numbers the Index scores.
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