ChatGPT Market Share Is Slipping to Gemini and Claude

You spent the last year asking one question about AI: does ChatGPT mention my business? Now the headlines say ChatGPT market share is slipping, and your customers may be asking Gemini, Claude and Copilot instead. That can feel like you checked one door while buyers walked in through three others. The shift is real, and a research firm has put numbers on it, but those numbers measure something specific, and they cannot tell you where your own customers ask. What you can control is closer to home. Each assistant pulls business facts from places you can see, and a short check shows whether yours come through correctly in each one. You can run that check yourself this week, before you spend anything on a new tool or service.

ChatGPT Still Leads, but Comscore Shows Prompts Spreading to Gemini and Claude

The numbers behind this week's headlines come from Comscore's Q2 2026 AI Intelligence Report, released on September 22, 2026. Comscore tracked what share of total AI prompt volume each assistant handled in its own panel, month by month, from January to June 2026. In that panel, ChatGPT went from handling seven of every ten prompts to handling half of them. Gemini and Claude grew over the same months.

The same release shows ChatGPT is still the largest assistant in Comscore's data by a wide margin. Comscore counted 168 million ChatGPT desktop conversations in June, against 89 million for Gemini and 22.3 million for Claude. It also reported 99 million ChatGPT multiplatform visitors in June, up from 59 million a year earlier. Both things are true at once in Comscore's own figures: ChatGPT's visitor count grew, and its share of prompts shrank, because prompts to the other assistants grew faster in that panel.

The report also gives a sense of how common this has become. Comscore says 35% of desktop users and 29% of mobile users in its panel visited an AI assistant in June. If you sell to the public, some of the people deciding whether to call you may ask a chatbot first.

Keep three limits in mind when you repeat these figures. They are shares of prompt volume, not shares of users and not revenue. The public release does not state the panel size, the list of countries, or every product counted, so they should not be turned into a global user share. And the release gives no prompt-share figure at all for Copilot, Perplexity or Meta AI, which means the table above is not the whole field.

Other Trackers Count Different Things and Reach Different Numbers

Comscore is not the only firm measuring AI chatbot market share, and the others land on different figures. That is not because someone got it wrong. Each firm counts a different thing, so the percentages answer different questions.

Sensor Tower's State of AI 2026 release from June 16, 2026 also says ChatGPT's "True Audience" share, which counts unique users across the mobile app and the web, fell below 50% in March. The Similarweb figures come from reporting that attributes August 2026 numbers to Similarweb, which also lists DeepSeek at 3.4%, Grok at 2.4%, Copilot at 1.6% and Perplexity at 0.9%. No dated primary release from Similarweb for that exact table has been found, so treat it as reported, and as website traffic only, with no app usage in it.

StatCounter's AI chatbot market share chart shows ChatGPT far ahead at 79.4% for August, with Perplexity at 4.31% and Copilot at 2.79%. StatCounter's own FAQ explains that it tracks what it observes on the websites that run its code. So, its chart counts visitors who arrive at a site from a chatbot, not how many people ask a chatbot anything.

Read side by side, the trackers still agree on the shape. ChatGPT is first in every one of these four. Gemini is second in every one. Claude's figure ranges from about 11% down to under 3%, depending on what is being counted. When you see a claim about Claude market share or Gemini vs ChatGPT, look for which of these measures it is using before you act on it.

None of these charts can tell you which assistant your next customer will open. That is the practical reason to stop tracking a single number and start checking the assistants themselves.

Each Assistant Pulls Business Facts From Its Own Sources

The useful question for your business is not who is winning. It is where each assistant looks when a buyer asks about a company like yours. Each vendor documents this differently, and the sources overlap only in part. The four below publish enough to act on.

ChatGPT runs its own web search

OpenAI's ChatGPT Search help page says ChatGPT can search the web, show citations, and use your location for local results. OpenAI runs a crawler called OAI-SearchBot, which it says is used to surface websites in ChatGPT search. OpenAI also says it sometimes works with other search providers, without naming one provider for every answer or naming any business-listing feed. What this means for you: your own website has to be open to OAI-SearchBot and has to state your facts plainly.

Gemini can ground answers in Google Search

Google says some Gemini responses are grounded in Google Search, and that Gemini may draw on Google services, connected apps, your location and public websites. That makes your Google presence, including your Business Profile and your pages in Google's index, especially relevant when someone asks Gemini about a business like yours.

Claude searches the live web when it needs to

Anthropic's help center says Claude can search the web when the feature is on or when a question calls for current information, read several sources, and cite them. Anthropic does not publish a full description of its text search index or any local-listing feed. So, for Claude, the pages a search can reach and read are the part you control.

Copilot sends its web searches to Bing

Microsoft's documentation for web search in Microsoft 365 Copilot Chat says Copilot sends generated search queries to Bing, and shows a Sources button with the query and the pages it used. Bing, in turn, finds pages with its own crawler, Bingbot, and answers from its own index. If your site is not in Bing's index, Copilot's web answers have less of you to work with.

Perplexity and Meta AI have not published comparable documentation that names a business index, so do not assume they read your Google Business Profile or Bing Places listing directly. The same goes for any assistant: a change to one listing does not show up automatically everywhere.

No Assistant Offers a Special AI Schema or a Guaranteed Citation

If you are wondering whether a special file or markup gets you into all of these at once, the vendors answer it directly. Google's guidance on AI features in Search says, "There are no additional requirements" to appear in AI Overviews or AI Mode. A supporting link has to be indexed and eligible to show a snippet in regular Search. Google also says there is no special AI schema, and no guarantee that a page will be indexed or shown.

What Google does ask for is ordinary. Let crawlers reach your pages, put the important information in text, keep structured data matched to what the page visibly says, and keep your Business Profile and Merchant Center details current. Google's LocalBusiness structured data guide covers the markup side, and it describes facts that should already be on the page.

OpenAI's publishers and developers FAQ makes a similar request: do not block OAI-SearchBot if you want your content included in ChatGPT search summaries and snippets. It does not promise inclusion either. If you want the ChatGPT side in more detail, our walkthrough on how to get cited by ChatGPT covers it step by step.

The practical result is a short list of things to skip. Skip paying for an "AI file" or hidden prompt text sold as a way to force a mention. Skip adding schema just because someone says it guarantees a citation. Put that money and time into facts that are correct, crawlable and consistent.

A Ten-Minute Cross-Assistant Check Shows Where You Stand

You do not need a tool or a subscription to see what these assistants say about you. You need one customer question, four browser tabs and a notepad. The steps below take about ten minutes and give you a record you can compare against later.

Ask one customer question in four assistants

Pick a question a real buyer would ask, such as "Who provides [your service] in [your town], and what should I know before hiring one?" Ask it in ChatGPT with search on, Gemini, Claude with web search on, and Copilot. Use the same device, the same location, the same wording and the same signed-in state where you can, so the answers are comparable.

Write down what each one says and cites

For each assistant, note whether your business is named, and every claim it makes about your services, location, phone number, hours, prices, reviews and availability. Note which websites it cites, and whether a map or a listing card appears. Save a screenshot or copy the text.

Ask about your business by name

Then ask, "What is [your business name] in [your town]?" This checks whether each assistant knows who you are, which is a different question from whether it recommends you for a category. A business can pass the name test and still not appear in the category answer, or the other way around.

Compare every answer with the records you control

Hold each answer up against your website, your Google Business Profile and your Bing Places listing. Mark anything that is wrong, out of date or missing. One assistant leaving you out of one answer does not prove you are absent everywhere, because answers change with the wording, the location, the plan and whether the assistant searched the web at all.

Keep your notes with the date on them. When you rerun the same check in a month, you will be comparing like with like, and you will see whether a fix you made is showing up.

Wrong Answers Get Fixed at Their Source, Starting With What You Own

When the check turns up an error, the fix belongs in the record the assistant is reading, not in the assistant. The order below is a practical one, based on what Google and Bing let you control directly. No published study ranks these failures by how often they happen.

1. Your own website facts: Wrong hours, an old phone number, the wrong address or service area, missing services, or location pages that are unclear. Check the footer, contact page and service pages together.
2. Your business listings: Claim and verify your Google Business Profile, keep its core fields current, and separately claim and complete Bing Places. Remove duplicate or outdated listings where you can.
3. Pages crawlers cannot use: Pages that are blocked, thin, hard to load or out of step with your listings.
4. Third-party directories: Old facts on sites you do not own, which take longer to correct.
5. Evidence for comparison questions: Reviews, independent mentions and real proof of your work, which matter when a buyer asks an assistant to compare you with a competitor.

These sizes are estimates of the work involved, not times any platform publishes. Google's own help on how local results are ranked names relevance, distance and prominence, and counts links and reviews toward prominence, but those are Google signals, not a formula for every assistant. If Google's AI Overview is the one getting your facts wrong, our post on what to do when Google's AI Overview is wrong about your business covers the steps for that case.

After you make changes, watch referral traffic by source in your analytics. Do not treat a lack of AI referrals as proof that no assistant mentions you, though. Many answers are read and acted on without a click, so the phone call may come with no referral trail behind it.

Frequently Asked Questions About chatgpt market share

Is ChatGPT still the biggest AI assistant?

By every measure cited here, yes. In Comscore's panel it handled 50% of AI prompt volume in June 2026, ahead of Gemini at 30% and Claude at 11%. Other trackers measure different things and put it anywhere from under 50% to 79.4%.

What did the Comscore AI report actually measure?

Comscore's Q2 2026 AI Intelligence Report measured each assistant's share of AI prompt volume within its own panel, from January to June 2026. It is not a count of users or revenue, and the public release does not give the panel size or country list.

Gemini vs ChatGPT: which one should my business focus on?

Both, and Claude and Copilot too, because each pulls from different sources and market share cannot tell you which one your customers use. Run the same customer question in all four and fix whatever they get wrong.

Does Gemini use my Google Business Profile?

Google says some Gemini responses are grounded in Google Search and may use Google services, location and public websites. That makes your Business Profile and your Google-indexed pages especially relevant for Gemini.

Do I need special AI schema to show up in AI answers?

No. Google says there are no additional requirements and no special schema for its AI features. Structured data should match what your page visibly says.

Can anyone guarantee my business gets cited by ChatGPT, Gemini or Claude?

No. Google says eligibility does not guarantee indexing or display, and OpenAI does not promise inclusion. What you can do is keep your facts accurate and reachable, and check the answers regularly.

Wrapping Up

ChatGPT market share is slipping in Comscore's panel, from 70% of AI prompts in January to 50% in June 2026, while Gemini and Claude grew. Other trackers count visits, traffic and referrals and reach different numbers, but ChatGPT still leads in all of them and Gemini sits second. Each assistant finds business facts in its own way, through its own search, Google Search or Bing, and none of them offers a special schema or a guaranteed mention.

The work that pays off does not change with next quarter's chart. One accurate, crawlable set of business facts on your website, your Google Business Profile and Bing Places gives every assistant the same correct answer to find, and a dated ten-minute check tells you when one of them has it wrong.

If your check turns up wrong hours, a missing service or an assistant that cannot find you at all, Web Leveling can help trace each error back to its source and fix it there. Our generative engine optimization work covers the website, listings and crawl access that ChatGPT, Gemini, Claude and Copilot read from, and we check the answers again after the fixes land. We work with small and medium businesses across the country and overseas. Send us what the assistants said about your business, and we will tell you which fixes come first.

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