Ask the same thing in two tools

ChatGPT, Perplexity, and Gemini do not share one catalog or one ranking method. If you only read one answer, you cannot tell whether an option shows up everywhere or just in that tool today.

Updated 2 October 2026

You asked Perplexity for a running watch under your budget. It recommended two brands and linked to reviews.

You asked ChatGPT the same question and got a different pair of options, with no link to the shop you prefer.

Neither answer is automatically “more correct.” They are different sets of options, built through different retrieval paths. If you only read one, you may treat a local default as if it were the whole market.

Compare the options across tools

Those AI visibility tools just count mentions is written for people who run a site and need to log outcomes. The same habit helps if you only ask.

For one realistic question — a product, a service, or a place you have already narrowed down — note what each tool recommended. Ignore dashboards that collapse everything into one “visibility score.”

Signal	What it tells you
Recommended in both	Strong agreement or fame; still check facts
Recommended in one only	That tool looked in a different place
Linked but not recommended	Your page was a source; your product or place was not

Being cited rather than recommended matters when you are the operator. When you are the buyer, it matters because a helpful guide link is not the same as a vetted pick.

Shapes of answer differ too

A ChatGPT-style answer may give a few options with weak sourcing. A Perplexity-style answer may pair those options with citation links. A Google AI Overview may weave prose and links. The same words in the prompt can produce three layouts.

That is another reason one tool cannot stand in for “what AI thinks.”

Free and paid are not the same ChatGPT

A different list can also be the plan, not a different product. Last checked 2 October 2026, against ChatGPT’s pricing page. That page names models on the plan cards and in the compare-features grid. It does not say which model answers an ordinary product or place question by default in Chat.

Plan	What the pricing page states (2 Oct 2026)
Free	Unlimited text chats with GPT-5.6 Luna
Go	No separate chat model on the Go card; same unlimited text-chat wording as Free
Plus	Advanced reasoning models with GPT-6; compare grid lists GPT-6.1 Sol, GPT-6 Sol, and GPT-6 Luna as Expanded
Pro	Pro reasoning powered by GPT-6 Astra; compare grid lists GPT-6 Astra as Expanded

Two people on different plans can still be on different models. Paying does not by itself tell you which names will appear in the answer.

If you are the person asking

Disagreement between tools is useful. It tells you the answer is specific to that tool, not a fact about the whole market. Check that you compared the same plan, not free against Plus. Use overlap as a hint and still verify the facts you would act on — price, availability, and who you would buy or book from — on a live page.

If you run a shop or a place

When a client says “ChatGPT never names us,” ask which plan, which country, and which exact question. Free, Plus, and Pro are not one model. Write the plan, the date, the location, and the language next to each tool name. The log of named, only linked, or wrong is in Those AI visibility tools just count mentions. Diagnosis comes before a rewrite — see find out why you were skipped.