Does ChatGPT Use Bing? How ChatGPT Search Finds Sources
Yes, in part: Bing has been a ChatGPT search provider since 2023 and OpenAI still names Microsoft among its search partners, but ChatGPT also relies on its own OAI-SearchBot crawler.
By the Alphaa team. We build an AI agent that checks what ChatGPT, Gemini, Claude and Perplexity say about businesses. Every claim below links to OpenAI's or Microsoft's own documentation, read on 27 October 2026.
Short answer: Yes, ChatGPT uses Bing, but not only Bing. Microsoft made Bing the default search experience in ChatGPT in 2023, and OpenAI still names Microsoft among its search partners. ChatGPT also uses OpenAI's own crawler, OAI-SearchBot. To be found, a site should be indexed by Bing and open to OAI-SearchBot.
This guide is for business owners and marketers who want to know where ChatGPT gets the pages it cites, and what to check so their own site is one of them. It covers what OpenAI and Microsoft have said publicly, what they have not said, and a seven-step checklist.
Does ChatGPT search use Bing?
ChatGPT search uses Bing as one of its search providers, according to both Microsoft and OpenAI. In May 2023, Microsoft's Build announcement said Bing was coming to ChatGPT as the default search experience, so that answers would be grounded in web data and include citations.
OpenAI's current help article, Searching the web with ChatGPT, says ChatGPT search "sometimes partners with other search providers". Under the heading on information shared with search providers, it points readers to two privacy policies: Microsoft's and Shopify's. That is as close as OpenAI comes to naming its partners, and it is consistent with Bing being the general web provider and Shopify supplying shopping results.
How does ChatGPT search actually find sources?
ChatGPT search rewrites your question into one or more short search queries, sends them to a search provider, reads the results and may search again with more specific queries before it answers. OpenAI's help article gives an example: a long research question becomes "CCR8 immunotherapy drug development 2025", and a follow-up query narrows it further.
Location matters for local businesses. OpenAI says ChatGPT may estimate a general location from the user's IP address and share that general location, not the IP address itself, with search providers. A question like "good restaurants near me" from San Francisco may become the query "top restaurants San Francisco". If memory is turned on, saved details such as a dietary preference can shape the query too. So the query that reaches Bing is usually shorter and more specific than what the customer typed, which is why pages that state the city, the service and the key facts plainly tend to match. The mechanism is explained in more depth in what query fan-out is.
For some tasks ChatGPT pulls from specialist partners rather than a general index. The same help article says restaurant availability may come from OpenTable, Resy or Yelp, depending on the restaurant.
Where does ChatGPT get the information it cites?
ChatGPT draws on at least four routes: partner search providers such as Bing, OpenAI's own search crawler, task-specific partners, and what the model learned in training. Each one has a different lever for a business owner.
| Route | What OpenAI or Microsoft says | What you control |
|---|---|---|
| Bing (search provider) | Default search experience since 2023; Microsoft privacy statement linked in OpenAI's help | Bing indexing, sitemap, IndexNow, Bing Places listing |
| OAI-SearchBot (OpenAI's crawler) | Used to surface websites in ChatGPT search; blocked sites are not shown in answers | robots.txt and firewall or CDN rules |
| Shopping partner | Shopify privacy policy linked as a search provider | Product data on your store |
| Reservation partners | Availability from OpenTable, Resy or Yelp | Your listing on those platforms |
| Training data | What the model learned before its cutoff, used when no search runs | Long-term: consistent facts across the web |
The difference between the last row and the rest matters. When ChatGPT searches, a page you fix today can be cited soon after it is indexed. When it answers from training, nothing you change shows up until a future model. The split is covered in training data vs live retrieval.
Does ChatGPT use Google search results?
OpenAI has not said that ChatGPT uses Google, and Google is not among the search providers whose privacy policies OpenAI links in its help article. OpenAI also does not publish how much of each answer comes from each provider, or from its own crawler.
In practice that uncertainty does not change the work. Pages that are well indexed in Google are usually well indexed in Bing too, because both reward the same basics: crawlable HTML, a sitemap, clear titles and consistent facts. The gap tends to appear on newer or smaller sites that have never been checked in Bing at all, so Bing Webmaster Tools is worth a look even when Google Search Console looks healthy.
What is OAI-SearchBot, and why does it matter as much as Bing?
OAI-SearchBot is OpenAI's search crawler, and blocking it removes your site from ChatGPT search answers even if Bing has indexed every page. OpenAI's crawler documentation says sites that opt out of OAI-SearchBot will not be shown in ChatGPT search answers, though they can still appear as navigational links, and that a robots.txt change can take about 24 hours to take effect.
The help article adds a second condition: to be eligible, the website host or content delivery network must allow traffic from OpenAI's published searchbot IP addresses. That catches sites whose robots.txt is fine but whose firewall or bot-protection setting blocks unfamiliar crawlers. OAI-SearchBot is separate from GPTBot, which OpenAI uses for training, so you can block training and still allow search. The full list of AI crawlers and how to handle each is in the AI crawlers robots.txt guide.
How do you make sure ChatGPT can find your site through Bing?
There are seven checks, and most take minutes: open both doors, make your pages easy to index, and tell Bing when something changes. Microsoft's Bing Webmaster Guidelines now describe how content is chosen for Bing search, Copilot and grounding API results, and they say the same SEO fundamentals apply to all three.
- Allow OAI-SearchBot and Bingbot in robots.txt. Open yoursite.com/robots.txt and make sure neither is disallowed. Bing's guidelines list blocking Bingbot as something to avoid.
- Check your firewall or CDN. If you use bot protection, confirm it lets through OpenAI's published searchbot IP addresses and Bingbot.
- Verify your site in Bing Webmaster Tools. It shows which pages Bing has indexed and why others were left out. You can import a verified Google Search Console property to save time.
- Submit an XML sitemap with accurate lastmod dates. Bing says sitemaps should list only canonical URLs and include freshness signals such as lastmod.
- Turn on IndexNow. IndexNow is a simple ping that tells participating search engines, including Microsoft Bing, that a URL was added, updated or deleted. Many CMS plugins and CDNs support it.
- Remove directives that limit citations. Bing says NOARCHIVE stops content being used in Copilot responses and grounding results, and NOCACHE limits it to the URL, title and snippet. Check your SEO plugin has not set either sitewide.
- Claim your Bing Places listing if you serve customers locally. Local questions often run through a map and listing layer, and Bing's is separate from Google Business Profile.
One more check sits outside Bing: make sure your important text is in the HTML, not loaded only by JavaScript. Bing's guidelines warn against hiding critical content behind client-side rendering, and the same issue affects OpenAI's crawler; see JavaScript rendering and AI crawlers.
Does ranking well in Bing mean ChatGPT will recommend you?
No. Being in Bing's index makes your pages eligible to be found, but ChatGPT still decides which results to read, quote and recommend. OpenAI's help article says ChatGPT ranks results using multiple factors and that placement is not guaranteed.
What tends to tip the decision is the content itself: a page that answers the rewritten query directly, states facts that can be checked, and agrees with what reviews and listings say elsewhere. Bing's own guidelines point the same way, favouring content that is clear, focused on one topic, verifiable on the page and consistent in how it names people, products and places. The broader playbook is in how to get recommended by ChatGPT, and Microsoft's own assistant is covered in how to get recommended by Microsoft Copilot.
The fastest way to know whether any of this is a problem for you is to look. Ask ChatGPT the questions your customers ask, with search on, and see which sites it cites. Or run the free 60-second AI check, which asks ChatGPT, Gemini, Claude and Perplexity and reports what each one says about your business.
What else do people ask about ChatGPT and Bing?
Is ChatGPT search powered entirely by Bing?
No. OpenAI says ChatGPT search sometimes partners with other search providers, and it also runs its own crawler, OAI-SearchBot. OpenAI does not publish how much of any answer comes from Bing.
If my site is not in Bing, can ChatGPT still cite it?
Possibly, through OAI-SearchBot, but you are relying on one route instead of two. Checking Bing Webmaster Tools is free and quick, so there is little reason to leave the Bing route closed.
Does Bing Places affect ChatGPT recommendations for local businesses?
OpenAI has not said so directly, but local questions are sent to search providers with a general location attached, and Bing is one of those providers. A claimed, accurate Bing Places listing is low-cost insurance that the facts it returns about you are right.
Should I block GPTBot to stop OpenAI training on my content?
You can block GPTBot without affecting ChatGPT search, because OpenAI uses OAI-SearchBot for search and GPTBot for training. Just make sure the rule names GPTBot only and does not block OAI-SearchBot as well.
How quickly does a change show up in ChatGPT search?
There is no published timeline. OpenAI says robots.txt changes take about 24 hours to register, and IndexNow helps Bing pick up new or changed URLs sooner, but when a given answer reflects the change is up to ChatGPT.