The place Does ChatGPT Get Its Info? 4 Sources, Defined

Which one it makes use of depends upon your query.

Earlier than a mannequin like those behind ChatGPT is launched, it is skilled on an unlimited quantity of data.

That coaching is the place ChatGPT’s common information comes from: how language works, information in regards to the world, learn how to write code, what issues seem like, and so forth.

The coaching happens in stages: making ready knowledge, pre-training, post-training, and ongoing analysis. (We go deeper on this in how reply engines work.) First comes pre-training on that vast combine of knowledge. Then comes post-training, the place human trainers and researchers (and more and more the fashions themselves) train it to comply with directions, motive, and behave safely.

What particularly is on this combine? The final time OpenAI revealed an in depth breakdown of its coaching knowledge was for GPT-3, again in 2020. That blend was:

Since then, OpenAI has shared much less and fewer. Its newest system card says solely that the fashions “had been skilled on various datasets.” So no one exterior OpenAI is aware of precisely what’s in ChatGPT’s coaching knowledge in the present day.

What does that imply for you? In case your web site is public and would not block OpenAI’s coaching crawler, there is a good probability your pages find yourself within the knowledge future fashions be taught from. That is how ChatGPT can “know” your model with out trying to find it. But it surely’s gradual and oblique: your content material solely reveals up within the subsequent mannequin, months later, and you may’t see what it realized.

OpenAI doesn’t use every bit of data it could possibly collect. For instance, OpenAI says that it would not deliberately collect knowledge “from sources recognized to be behind paywalls or from the darkish net,” and that it filters out materials like hate speech, grownup content material, websites that combination private info, and spam.

OpenAI additionally says that they’re “more and more” utilizing artificial knowledge, coaching materials its personal fashions generate. OpenAI’s examples embrace observe prompts and examples in languages with little coaching textual content. The unique ChatGPT search model was partly skilled on solutions written by a stronger OpenAI mannequin (o1-preview).

Sure. Some web site house owners don’t desire their work used to coach AI without cost, and large publishers typically block it to maintain leverage in licensing offers. The truth is, GPTBot is the most-blocked AI crawler, based on our research of ~140 million web sites.

The trade-off is that future fashions be taught much less about you from your individual web site. In order for you ChatGPT to know your model, you in all probability need to depart it open.

In case you do need to choose out, there are two methods:

The information cutoff is when a mannequin’s coaching knowledge stops. ChatGPT would not find out about something that occurred after that date except it searches the net.

For the fashions in ChatGPT in the present day, the cutoff is spring 2026, and it depends upon your plan:

So for something since then, ChatGPT’s reply has to return from search, not from coaching.

Coaching knowledge is already outdated when a mannequin is launched. GPT-6 Sol’s information stops on April 20, 2026, however it solely reached ChatGPT on October 7, virtually six months later. To reply questions on costs, information, merchandise, or something latest, ChatGPT searches the net.

In accordance with OpenAI, ChatGPT could search robotically “when your query would profit from present info.” You may also make it search by selecting Search your self.

In my very own check of 12 questions in a logged-out ChatGPT, 9 triggered a search: present occasions, costs, product suggestions (“greatest X in 2026”), and something the place we requested for sources. Solely easy definitions, like “what’s a backlink,” had been answered from coaching alone.

Search is now an enormous a part of how folks use ChatGPT. In November 2026, ChatGPT’s client product lead, Adam Fry, told Big Technology that ChatGPT’s net searches add as much as roughly one-fifth of Google’s question quantity. He counted every query that sends ChatGPT to the net as one search. OpenAI’s personal utilization knowledge, OpenAI Signals, reveals that about one in 5 client messages (20.2% in September 2026) are folks on the lookout for info.

ChatGPT would not paste your query right into a search engine. OpenAI says it sometimes rewrites your immediate into a number of focused searches, then could ship extra particular searches to different suppliers to refine the outcomes.

This course of is named question fan-out: one immediate “followers out” into a number of searches, every overlaying a distinct a part of the query. The searches ChatGPT writes are known as fan-out queries. For instance, “greatest CRM for a small company” would possibly fan out into “greatest CRM for companies 2026”, “HubSpot vs Pipedrive pricing”, and “CRM evaluations small enterprise”.

In our ChatGPT question fan-out research of 66.6 million responses from free, logged-out ChatGPT (August to September 2026), responses that contained fan-out queries had about 1.6 every.

A separate academic study (80 questions, run 20 occasions every on GPT-5.3 and GPT-5.5 Immediate, March to July 2026) discovered that these fashions by no means searched the person’s actual wording. When questions had been requested in Chinese language, about 70% of the runs with seen searches had been searched solely in English. The identical research discovered that even Google’s outcomes and OpenAI’s personal search API mixed solely matched about 27% of the pages ChatGPT cited, and about half of the websites.

Your personal particulars can change the search too. OpenAI says ChatGPT can add particulars out of your saved recollections to its searches. For instance, should you’ve shared that you simply’re vegan and reside in San Francisco, asking for close by eating places could produce a seek for “good vegan eating places San Francisco.” ChatGPT can even use your approximate location, based mostly in your IP tackle. It shares that general location, however not the IP tackle itself, with search suppliers.

Lastly, the supply it selects will change, even should you ask the identical query. This occurs as a result of ChatGPT is non-deterministic: the identical enter would not at all times produce the identical output.

For instance, my colleague Glen Allsopp tracked 1,300+ prompts daily for four weeks and located that solely a few quarter of the pages ChatGPT cited for a immediate had been cited once more the subsequent day. The domains it cited most constantly had been a lot steadier, altering by about 14% from someday to the subsequent, in opposition to 74% for every little thing else.

OpenAI says ChatGPT “ranks search outcomes utilizing a number of components,” and that placement is not assured. It would not checklist the components.

The largest issue is what you ask. For this text, we pulled 4,000 US ChatGPT prompts from Ahrefs’ Model Radar in October 2026 and sorted each cited supply by sort.

Our analysis provides some extra clues:

That is the massive one. We all know ChatGPT will get a variety of its info from search outcomes, however whose? If it is Google’s, rating on Google is your greatest guess. If it is Bing’s, you might want to watch Bing too.

Nevertheless, in 2025, The Info reported that OpenAI had used a scraping service known as SerpApi to pull Google results for real-time matters like information, sports activities, and finance. OpenAI hasn’t publicly confirmed it.

Do ChatGPT’s citations match what these serps rank? Our knowledge research present that the reply is generally no:

In different phrases, rating on Bing predicts ChatGPT’s citations no higher than rating on Google. No matter search outcomes ChatGPT will get again, it makes its personal selections about which pages to quote.

Meaning you may’t inform whether or not ChatGPT cites you simply by taking a look at your Google or Bing rankings. To see that, you might want to have a look at ChatGPT’s precise solutions with a software like Ahrefs’ Model Radar, which reveals which prompts point out and cite your web site.

So the very best reply to the query? Possible a mixture of every little thing: Bing and different suppliers, OpenAI’s personal index, and companion content material, adopted by ChatGPT’s personal selections about what to quote.

When a query has buying intent, ChatGPT can present product playing cards with photos, costs, and hyperlinks to purchase. OpenAI’s shopping help page says these merchandise are chosen utilizing “structured metadata from first-party and third-party suppliers (e.g., worth, product description) and different third-party content material,” plus your context, like reminiscence and customized directions.

OpenAI says product outcomes “should not adverts, nor influenced by any OpenAI partnerships.” Adverts in ChatGPT are proven individually.

Since 2023, OpenAI has signed content material offers with greater than 20 publishers, together with the Associated Press, Axel Springer, Condé Nast, Hearst, Future, People Inc. (formerly Dotdash Meredith), News Corp, Vox Media, The Washington Post, The Guardian, and the Financial Times.

Since June 2026, licensed Getty Photos images additionally seem in ChatGPT’s search outcomes, beneath a display deal. In November, media.gettyimages.com entered ChatGPT’s prime 10 most-cited domains for the primary time, at #9, based on our checklist of essentially the most cited domains in ChatGPT:

Every deal works roughly the identical method: the writer licenses its content material to OpenAI, and ChatGPT reveals summaries of that content material with attribution and a hyperlink again to the unique article. For instance, OpenAI’s Grupo Folha and Grupo UOL announcement says their journalism will seem in ChatGPT with summaries, attribution, and hyperlinks to the unique articles.

Ten companion domains are among the many 50 websites ChatGPT cites most, and 47 are within the prime 500. Associate websites’ share of citations amongst ChatGPT’s 200 most-cited domains additionally greater than doubled between March and July 2026, from 7.5% to fifteen.8%, and was 12.5% in late September.

Curiously, the companions that do greatest aren’t primarily information websites. They’re assessment and life-style websites, like Vogue, Good Housekeeping, TechRadar, and extra.

As we will see from our knowledge, a deal would not assure visibility. Vogue was cited 42,108 occasions; The Atlantic, additionally a companion, simply 724. As our evaluation places it: “A partnership makes a writer eligible to indicate up in ChatGPT, however it would not assure it.”

There’s additionally some proof that companion content material reaches ChatGPT otherwise from the remainder of the net. David McSweeney, founding father of QueryBurst, discovered that some high-authority publications, together with Time, Enterprise Insider, and Forbes, have pre-written, page-level summaries that seem to go straight into ChatGPT’s context. Suganthan Mohanadasan noticed a separate retrieval supply in ChatGPT’s site visitors known as “labrador,” which he describes as a “licensed tier”.

Our fan-out knowledge factors the identical method. Associate websites are cited way more typically than ChatGPT searches for them by title: of 17 companions, Reddit was the one one among the many 150 websites ChatGPT most frequently searched with web site:.

Past its coaching and the net, ChatGPT makes use of no matter you give it:

Even your account issues. For instance, once I requested ChatGPT “what’s a backlink” in a logged-out, free account, it gave me a matter-of-fact reply.

Nevertheless, once I requested the identical query in my work ChatGPT account (a part of Ahrefs’ ChatGPT Enterprise workspace), it all of the sudden talked about Ahrefs.

By the way in which, it doesn’t simply change the reply. It additionally modifications what ChatGPT searches for. For instance, the query “What are the very best AI visibility instruments” triggered a 26-website search in my Enterprise account:

The free, logged-out model didn’t even set off a search.

When somebody pastes a hyperlink into ChatGPT, ChatGPT visits that web page on their behalf. OpenAI’s crawler documentation says these user-triggered visits use a separate agent, ChatGPT-Consumer, not the search or coaching crawlers.

Now that we all know how ChatGPT will get its info, one factor stands out: every little thing it says about you is secondhand. It is what it reads in coaching, what it finds when it searches, and what a companion writer wrote.

Your web site is one supply of data, and even that solely counts if it made it into coaching or ChatGPT picks it from a search.

So, right here’s what meaning by way of actual motion steps:

To see how properly that is working to your model, Ahrefs’ Model Radar reveals how typically ChatGPT (and different AI serps) names and cites you throughout hundreds of prompts, and your AI share of voice in opposition to opponents.