AI search guide · ChatGPT
How ChatGPT finds and cites sources.
What OpenAI documents about ChatGPT’s search, which of its crawlers to let in, and what checked studies say it cites.
Checked September 30, 2026 · from OpenAI’s documentation and checked studies
Free AI visibility check
The short answer
ChatGPT, in brief.
ChatGPT answers from the web through its own search features, which sometimes send your buyer’s question, rewritten, to partner search providers. To be eligible, let OpenAI’s OAI-SearchBot crawl your site: pages that block it aren’t shown in ChatGPT’s search answers. Then check what it says about you today, and fix the evidence it’s missing, not the phrasing. The step-by-step lives in why your business isn’t showing up in ChatGPT.
Sources
Where it finds sources
ChatGPT can search the web to answer with current information and links to sources. It sometimes partners with other search providers: it rewrites the question into one or more targeted queries and sends them to those providers.
OpenAI, Searching the web with ChatGPT · read September 30, 2026OpenAI’s page on ChatGPT search doesn’t name those providers.
OpenAI, Searching the web with ChatGPT · read September 30, 2026OAI-SearchBot is the crawler that surfaces sites in ChatGPT’s search features. Sites that opt out of it aren’t shown in ChatGPT’s search answers, though they can still appear as navigational links.
OpenAI, Overview of OpenAI Crawlers · read September 30, 2026
Crawlers
The crawlers to know
| User agent | What it does | robots.txt |
|---|---|---|
OAI-SearchBot | Surfaces sites in ChatGPT’s search features | Obeys it. Block it and your pages aren’t shown in ChatGPT’s search answers. |
GPTBot | Collects content that may be used to train OpenAI’s models | Obeys it. Blocking it opts you out of training, not out of search. |
ChatGPT-User | Visits a page when a user’s request needs it | May not apply, since a user started the visit; it doesn’t decide what appears in search. |
OAI-AdsBot | Checks the landing pages of ads submitted to ChatGPT | OpenAI doesn’t say. It only visits pages submitted as ads, and isn’t used for training. |
Source: OpenAI, Overview of OpenAI Crawlers · read September 30, 2026
Each setting is independent: allow OAI-SearchBot to appear in search and disallow GPTBot to stay out of training. Search takes about 24 hours to reflect a robots.txt change.
OpenAI, Overview of OpenAI Crawlers · read September 30, 2026Citations
What it tends to cite
- Vendor study87%+
More than 87% of ChatGPT search’s citations matched Bing’s top organic results for the same question; 56% matched Google’s.
A small, early sample, and ChatGPT’s search has changed since.
Seer Interactive, 87% of SearchGPT Citations Match Bing’s Top Results · Feb 6, 2025
Over 500 citations from a sample of 100 queries.
- Vendor study47% vs 69%
ChatGPT drew 47% of its citations from company websites, the lowest share of the major engines Profound tracked; on Gemini, company websites made up 69%.
Company websites here are any company’s own site, competitors’ included, on the prompts Profound tracks.
Profound, Where do AI citations come from? · Jul 30, 2026
11.84 billion citations from ChatGPT, Claude, Google AI Mode, AI Overviews, Gemini, Grok, Copilot and Perplexity, across 8,061 active Profound categories, April 16–July 16, 2026.
- Vendor study15%
ChatGPT cited 15% of the pages it retrieved to answer 15,000 prompts, and left 85% uncited.
AirOps doesn’t say which ChatGPT model it used, or when.
AirOps, The Influence of Retrieval, Fan-out, and Google SERPs on ChatGPT Citations · Mar 12, 2026
548,534 pages retrieved for 15,000 prompts, which ChatGPT expanded into 43,233 searches.
Stability
How much its answers change
- Vendor study<1 in 100
Asked for brand recommendations 100 times, ChatGPT and Google’s AI had less than a 1 in 100 chance of giving the same list in any two answers.
Run with a researcher from Gumshoe.ai, an AI-tracking startup, which SparkToro discloses. Claude repeated itself slightly more often.
SparkToro, AIs are highly inconsistent when recommending brands or products · Jan 27, 2026
600 volunteers ran 12 prompts through ChatGPT, Claude and Google’s AI 2,961 times in November and December 2025.
First steps
What to fix first
- 01
Allow OAI-SearchBot in robots.txt, and let OpenAI’s published IP ranges through your CDN or firewall.
- 02
Decide on GPTBot separately: blocking it keeps your content out of training, not out of search.
- 03
Put what matters in the HTML: OAI-SearchBot, ChatGPT-User and GPTBot were among the seven major AI crawlers that didn’t run JavaScript in Vercel and MERJ’s test.
- 04
Fix the pages that return errors: in Vercel and MERJ’s data, ChatGPT spent 34.82% of its fetches on pages that returned a 404.
- 05
Earn mentions off your own site: in AirOps’ B2B test, 85% of brand mentions came from third-party sites.
Your company
See what AI says about you
Trovance sweeps ChatGPT for your buyer questions every week on every plan. See the plans
Go deeper
Read next
- Why Your Business Isn't Showing Up in ChatGPT: A 2026 Guide to Showing Up in AI AnswersA plain-language diagnosis: whether the model can crawl you, index you, and find enough evidence to answer, plus what to check first.SEO/GEO8 min read
- Mentions, Citations, Recommendations: The Real Path Into ChatGPT AnswersA practical decision path for finding the missing outcome, checking the evidence behind it, and choosing the smallest honest fix.SEO/GEO9 min read
- The Sources Shaping What ChatGPT Says About Your BusinessSeparate learned model patterns from live web search, then audit the public evidence you can actually change.SEO/GEO10 min read
- Why ChatGPT Recommends Your Competitor Instead of YouFive failure modes decide an AI recommendation, and only one of them is about how much content you publish.SEO/GEO10 min read
FAQ
Questions, answered.
How do I get my company into ChatGPT’s answers?
Start with access: allow OAI-SearchBot, since pages that block it aren’t shown in ChatGPT’s search answers. Then check what ChatGPT says about you today, and give it the evidence it’s missing, often on sites other than yours. The full walkthrough goes step by step.
Does blocking GPTBot keep me out of ChatGPT?
No. OpenAI treats the two separately: GPTBot is for training and OAI-SearchBot is for search. Blocking GPTBot keeps your content out of training; it doesn’t remove you from search answers.
Which search engine does ChatGPT use?
OpenAI says ChatGPT search sometimes partners with other search providers, and its page on ChatGPT search doesn’t name them. In one small test from early 2025, more than 87% of ChatGPT search’s citations matched Bing’s top organic results, and 56% matched Google’s, so your Bing visibility is worth checking.
Rather ask a person? Text us.
Get understood. Get cited. Get chosen.
Text Trovance
Or, in iMessage, send this note to +1 (839) 205-9508:
Hi Trovance, show me how AI sees my company.
You choose to send it. Trovance replies, and sends the updates you ask for, over iMessage through our messaging provider. Reply STOP anytime. Tapping or sending never bills you.



