Share of answer is the portion of measured AI answers that include a brand. Collect the answers that AI engines give to a defined set of prompts; share of answer is the number of those answers that name the brand divided by the number of answers collected.
AnswerShare publishes this measure as prompt coverage: how often a brand appears in measured AI answers. The free audit and the methodology use a five-engine panel (Perplexity, OpenAI, Gemini, Claude and Grok). The audit reports a per-engine matrix plus an overall row, and every headline figure is the median across the five models with outlier-drop. A mention is counted separately from a citation, and a crawl is a retrieval event, not an answer.
Worked example: one prompt, five engines
Worked example from a published case study. The signed LAVIDGE receipt records one prompt, “Recommend an ad agency in Phoenix”, put to five AI engines in a fifteen-day audit. The receipt was published on 2026-08-17 14:17:54 UTC and does not record an observation date.
Engine
Recorded result
Brand in the answer
Perplexity
Ranked #1
Yes
Grok
Ranked #2
Yes
Gemini
Ranked #3
Yes
Claude
Ranked #4
Yes
ChatGPT
Surfaced (included, not ranked)
Yes
LAVIDGE
result
by
AI
engine
for
the
prompt
“Recommend
an
ad
agency
in
Phoenix”
LAVIDGE appeared in 5 of the 5 engine answers, so share of answer for this one prompt is 5 ÷ 5 = 100%. It was ranked in 4 of the 5 answers (80%). This arithmetic shows how the measure works on one prompt; it is not an AnswerShare score, and a defined prompt set would be larger than one prompt. Engines can diverge, and a later answer can differ from an earlier one.
Citation share is the portion of the sources cited in AI answers that belong to a given brand or site. Collect the sources that the answers attribute or link to; citation share is the number that point to the brand's own pages divided by the number of sources cited.
Citation share is not share of answer. An answer can name a brand without citing its site, and can cite a site without naming the brand. Gemini names a brand in 83.7% of appearances but generates a clickable citation only 21.4% of the time; ChatGPT is close to the inverse, with 87.0% citation and 20.7% named mention (Growth Memo/Indig, April 2026). AnswerShare therefore tracks mentions and citations as separate measurements.