# Does ChatGPT Use Training Data or Live Search? What You Can Influence

> ChatGPT answers from training data or from a live web search. You cannot change a model's memory, but you can make your pages findable when it searches.

Published: 2026-11-10
Source: https://www.itgrows.ai/business/blog/chatgpt-training-data-or-live-search
Publisher: ItGrows (https://www.itgrows.ai/business) — AI visibility for businesses

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ChatGPT uses both: it answers some questions from what its model learned in training, and for others it runs a live web search first and builds the answer from the pages it found. A business has almost no lever on the training data of a model that already exists, but it can influence the search side, because search reads pages at the moment of the answer, and those pages can be yours.

The difference decides where your effort should go. Training is a snapshot taken months before anyone asks. Search is a fetch that happens while a buyer is waiting for an answer. The first favours whatever was written about you before the snapshot; the second favours a page that a search engine can find and read now.

## What does ChatGPT know without searching?

A language model learns from a large body of text up to a fixed date and then stops learning. OpenAI lists that date for its flagship models in its API documentation: in its [model list](https://developers.openai.com/api/docs/models), checked on 29 October 2026, GPT-6 Astra has a knowledge cutoff of 30 April 2026. Whatever happened after a model's cutoff, including a business that launched, moved, renamed itself or changed what it sells, is not in that model's memory.

What is in memory is not stored as pages either. The model does not keep a copy of your website that it can quote or link to; it keeps patterns learned from everything it read. That is why an answer from memory comes without a citation, and why it can mix up details, merge two similar companies or describe a product as it used to be.

Training data is collected by crawlers. OpenAI's [crawler documentation](https://developers.openai.com/api/docs/bots) says GPTBot crawls content that may be used in training its generative AI foundation models, and that a site can disallow GPTBot to signal that its content should not be used for training. Note what that decision covers: future models, not the answers people get from ChatGPT search.

## When does an assistant search instead of answering from memory?

The model decides, question by question. OpenAI's developer guide to its [web search tool](https://developers.openai.com/api/docs/guides/tools-web-search) says the model can choose to search the web or not based on the content of the prompt, and that with the automatic setting, search is optional.

Anthropic's documentation for [Claude's web search tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool) spells the rule out. Claude searches when a request depends on information that is current, changing or outside its training data: recent events, current prices, information about specific organizations, people or products that might have changed, and explicit requests to look something up. It answers directly, without searching, when a request draws on stable knowledge such as established facts, coding concepts or creative writing.

For a business owner, the middle item is the one that matters. A question like "which bookkeeping software suits a small bakery" or "which agency in Leeds builds Shopify stores" is about specific organizations and products, so it is the kind of question that tends to trigger a search. A question like "what is a limited company" is stable knowledge and is more likely to be answered from memory, without naming anyone.

Our own testing shows the same split. In a test on 23 September 2026 of 20 German business questions, the model answered 10 without searching at all and cited nobody; where it searched, it cited primary sources (laws, ministries, OECD, large accounting firms) on 9 of 10, and firms were named only on "who should I hire / how to choose" questions.

## Which one can a business actually influence?

|  | Training data (memory) | Live search |
| --- | --- | --- |
| When it is used | Questions on stable knowledge, answered without searching | Questions on current facts or on specific organizations, people and products |
| How fresh it is | Up to the model's knowledge cutoff | The pages found at the moment of the answer |
| OpenAI's crawler for it | GPTBot | OAI-SearchBot |
| Can the answer cite your page | No, citations come from search results, not from memory | Yes, search answers include citations to pages from the results |
| What you can change | Only what future models might learn, with no say over when | Whether your pages can be found and read, starting now |

Training data is a long game you cannot steer. You can publish, keep GPTBot allowed and hope that a future model learns your name, but you cannot see what went into a training set, and a model that is already released does not change. A brand that has been written about for years may already be in a model's memory; a small business often is not.

Search is where the lever is. When the assistant decides to search, it reads the pages it finds and cites some of them. Your page can be one of them only if the search can find it, open it and read it, and only if it answers the question that was asked.

## What does this mean for a new or small business?

If your business started after a model's cutoff, it is not in that model's memory at all. If it is older but small, there may not have been enough written about it for the model to learn the name. Either way, asking ChatGPT "what do you know about my company?" tells you little: an answer from memory can be empty, outdated or confidently wrong, and it will not change until a new model is trained.

Search works on different terms. It looks for pages that answer the question at the moment the question is asked, so the age of your brand matters less than whether such a page exists and can be reached. That is why a young business is better off building pages around real buyer questions than trying to get "into the training data". To see where you stand right now, the free check at [itgrows.ai](https://www.itgrows.ai/) generates five buyer questions from your homepage and shows how ChatGPT and Perplexity answer them: one answer right away, all five once you create an account.

## Why does it matter that search can find and read your pages?

Because the search side has its own gatekeepers, and they are not the training ones. OpenAI's [crawler documentation](https://developers.openai.com/api/docs/bots) says OAI-SearchBot is used to surface websites in ChatGPT's search features, that sites opted out of OAI-SearchBot will not be shown in ChatGPT search answers (though they can still appear as navigational links), and that after a robots.txt change it can take about 24 hours for its search results to adjust. Blocking GPTBot signals that your content should not be used for training; blocking OAI-SearchBot keeps you out of the search answers, the side you can influence. It is easy to block the wrong one, so check which is which in our guide to [AI crawler user agents](https://www.itgrows.ai/business/blog/ai-crawler-user-agents).

Google sets a similar bar for its own AI answers. Its page on [AI features and your website](https://developers.google.com/search/docs/appearance/ai-features), last updated on 10 December 2025, says that to be shown as a supporting link in AI Overviews or AI Mode, a page must be indexed and eligible to be shown in Google Search with a snippet, and that there are no additional requirements or special optimizations.

Being indexed somewhere is not the same as being found by an assistant, though. On 19 October 2026 we asked assistants for the exact titles of 18 articles, each older than three weeks, published on three client sites. ChatGPT found 1 of 18; Claude found 7 of 18. Google had indexed 29 of 30 articles of one of those sites. Being in Google's index did not mean an assistant could find the page.

What to check on your own site:

- **robots.txt** allows the search crawlers (OAI-SearchBot for ChatGPT and the equivalents of the other assistants), not only Googlebot.
- **The text is in the HTML** the server sends, not added later by JavaScript; see [whether ChatGPT reads JavaScript websites](https://www.itgrows.ai/business/blog/does-chatgpt-read-javascript-websites).
- **One page answers one buyer question**, with the answer near the top, in the words a buyer would use.
- **The page is indexed** by the search engines, and you have checked it rather than assumed it.

## How can you tell from an answer which of the two happened?

Look for citations. OpenAI's [web search guide](https://developers.openai.com/api/docs/guides/tools-web-search) says that by default a response built on search includes inline citations for the URLs found in the search results, and Anthropic's [web search documentation](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool) says Claude's response includes citations for the sources drawn from its search results. An answer with inline citations drew on a search; an answer with no sources at all most likely came from memory.

A few more signs help:

- **Recent facts.** An answer that mentions something from after the model's knowledge cutoff had to come from a search.
- **What happens when you ask it to look it up.** An explicit request to search is one of the triggers Anthropic lists; if the answer then changes and gains sources, the first one came from memory.
- **The kind of question.** A "which provider should I use" question is far more likely to have been searched than a "what is" question.

Ask the same buyer question several times, in fresh chats, because a single run is not a measurement. Our guide on [how to check if ChatGPT, Claude, Gemini and Perplexity name you](https://www.itgrows.ai/business/blog/how-to-check-if-chatgpt-recommends-your-business) shows how to do this by hand. ItGrows also gives you a free detailed report once you create an account: 20 buyer questions, each put once to ChatGPT, Claude, Gemini and Perplexity, showing who is named instead of you and which sites the assistants cite.

## Frequently Asked Questions

**Can I get my business into ChatGPT's training data?**

Not in any way you can control. You can publish useful pages and leave GPTBot allowed, which lets OpenAI collect content that may be used to train future models, but nobody can tell you whether or when your pages end up in one. A model that is already released does not change.

**If I block GPTBot, will ChatGPT stop citing my site?**

Not according to OpenAI's documentation: GPTBot collects content for training, while OAI-SearchBot is what surfaces sites in ChatGPT's search answers. Blocking OAI-SearchBot is what removes a site from those answers, so check which of the two your robots.txt actually blocks.

**Does ChatGPT search the web for every question about a business?**

No. The model decides per question whether to search, and questions about specific companies, products and current facts are the ones that tend to trigger it. Broad "what is" questions are often answered from memory and name no one.

**What should I do if ChatGPT says something outdated about my company?**

Ask it to look your company up and see whether the answer changes and gains sources. If it does, the old answer most likely came from memory, and the fix is a current page on your own site that states the facts plainly and that search crawlers can reach. A model trained later may pick up the correction too, but you cannot schedule that.