Tracked platforms
The five AI assistants RankX AI tracks, what each is good for, and why Google AI Overviews is deliberately not one of them.
RankX AI tracks five AI assistants: ChatGPT, Gemini, Claude, Perplexity and Grok. All five are on every plan, with no engine add-ons, by policy. Every tracked prompt is asked on every assistant enabled for the Website, so the five are a panel rather than a menu.
Google AI Overviews is a sixth surface RankX AI watches, and it is deliberately not in this list. It is measured a different way, and folding it in would overstate your assistant coverage by a fifth.
The five
ChatGPT is the one every reader recognises, and it covers the broadest range of everyday consumer and business questions. If you track one assistant closely, this is usually the one your buyers actually used.
Gemini is integrated with Google Search and Workspace, which makes it the assistant that matters most to brands whose buyers already live in Google. It is also the one whose behaviour is most entangled with your ordinary search presence.
Claude skews to nuanced research and document-heavy work, and is strong in B2B contexts. A considered-purchase brand often finds its clearest signal here, because the questions asked of it are longer and more specific.
Perplexity is AI-native search with real-time citations, so it is the clearest view of which sources are being surfaced alongside your brand. If you are working the citation side of this problem, Perplexity's answers are the most legible evidence.
Grok has live web and X access, so it picks up trending and real-time mentions that the others miss. It is the assistant most sensitive to what is being said about you right now rather than to what is written down.
Why per-assistant figures are the real figures
The five disagree with each other by design. They retrieve differently, they were trained differently, and they answer the same question differently on consecutive runs.
That is not a defect in the measurement, it is the shape of the thing being measured. So:
Read per assistant. A 40% mention rate on one and 10% on another is two findings. Averaging them to 25% describes neither.
Do not average a missing assistant in. A blank rate is unknown, not zero, and folding it into an average silently invents a measurement.
Expect movement between runs. Two runs of the same prompt frequently return different brand lists. The reliable unit is a rate across a panel of prompts over several runs, not a figure from one.
Google AI Overviews is separate, and it is measured differently
| The five assistants | Google AI Overviews | |
|---|---|---|
| What it is | An assistant answering a question | A summary above a search results page |
| Measured by | The AI-visibility run, on your tracked prompts | The rank tracker, on your tracked keywords |
| Where it lives | AI Visibility | Google Results |
| Widened by adding | Prompts | Keywords |
Gemini and Google AI Overviews are both Google's and are still two different things. One is an assistant answering a tracked prompt in the scheduled run; the other is a summary above a results page, captured by the rank tracker. A brand can do well on one and badly on the other, and that gap is a finding rather than an inconsistency.
What every check costs
An AI visibility check is charged per prompt, per assistant, per run, so the five assistants multiply your prompt list by five. That is the arithmetic behind most accounts' recurring spend, and it is set out in credits and metering.
Prices are on the credit cost reference, which is generated from the product.
Turning an assistant off
You can disable an assistant for a Website if it genuinely does not matter to your buyers, and doing so removes it from every future run and from that run's cost.
Two things to weigh. It stops the spend on that assistant immediately, which is a real saving on a large prompt list. And it ends the series: a rate you stop collecting is a comparison you cannot make later, and the history you already have does not extend itself.
Where to go next
- The tracked platform reference, which is the generated table.
- AI Prompts, for the panel the assistants are asked.
- AI Overviews, for the Google surface.
AI Answer Citations
The domains and pages AI assistants cited when answering your tracked prompts. What the list is good for, and why it is not AI Overview Citations.
AI Readiness
Whether AI assistants can reach, read and understand your site. Five scored categories, the checks RankX AI actually runs, and why a score can be withheld.