← Back to blog

Indexing for AI: the index behind Perplexity, Bing and SearchGPT

Published on October 09, 2026

AEO and GEO Fundamentals
Indexing for AI: the index behind Perplexity, Bing and SearchGPT

Perplexity, Bing and SearchGPT don't read the internet live when they answer a patient. Each one queries an index, a pre-existing collection of pages gathered by bots, and your clinic can only be recommended if it's inside that collection. Understanding which index powers each AI is the first technical step toward visibility in artificial intelligence.

At Bincoo, as we've diagnosed thousands of clinics, we often find beautiful websites that simply aren't in the right index, or are indexed incompletely, with half their pages out of reach of the AIs.

More than 10,000 companies already use Bincoo to be recommended by ChatGPT, Gemini and other platforms.

Who uses which index

PlatformMain indexWeight of external sources
PerplexityBing and its own indexingVery high, cites sources in the answer
Bing and CopilotBingHigh
SearchGPTOpenAI search with partnersHigh, prioritizes accessible pages
GeminiGoogle's indexMedium, along with Graph and web sources
Pure ChatGPTTraining knowledge, no live searchDepends on what was gathered from the web

The practical conclusion: anyone who only cares about Google leaves the front door of Perplexity, Bing and Copilot closed.

What takes your clinic out of the index

  1. Accidental blocking: robots.txt rules or no-index tags copied from templates;
  2. Slow or unstable site: bots abandon pages that take too long to load;
  3. Pure JavaScript content: text loaded only in the browser may not be gathered;
  4. Duplicate pages: versions with and without www split authority;
  5. Missing sitemap: the bot takes longer to find new pages;
  6. New site with no external links: with no path in, discovery slows down.

Step by step: index your clinic in the indexes that matter

1. Check the essentials in Google

Confirm in Search Console that your service pages are indexed. It's the foundation for Gemini and AI Overview.

2. Sign up for Bing Webmaster Tools

It's free and covers Bing, Copilot and much of Perplexity. Submit your sitemap and verify the URLs of your service pages.

3. Fix blocks

Review robots.txt and meta tags. Don't block bots without a clear reason.

4. Create paths in

Mentions on portals, directories and local news stories work like shortcuts: even without a perfect sitemap, bots arrive by referral.

5. Publish regularly

New and updated pages signal a living site and gain crawl priority.

6. Monitor the answer, not just the index

The final test is to ask the AIs and see if your clinic shows up. The index is the means; the answer is the end.

Indexed is not recommended

A page can be perfectly indexed and never cited. The index solves presence; citability solves choice. Between the two, the AI filters for clarity, specificity and trust. That's why the complete work combines indexing technique with content written to be used as an answer.

How Bincoo takes care of this layer

Bincoo diagnoses whether your pages are accessible to the crawlers of the leading AIs, points out blocks and generates the content that turns indexing into citation.

With the Essential plan, at R$ 39.00/month, you get the technical diagnosis, the weekly visibility report and optimized articles ready to publish.

Conclusion

  • Perplexity and Bing depend on Bing's index; Gemini, on Google's; SearchGPT, on accessible and indexable sources;
  • Accidental blocks and sites that rely on JavaScript are the most common villains;
  • Indexing opens the door; citable content makes the AI choose you.

Want to confirm whether your clinic is in the index of the AIs your patients use? access Bincoo and run the diagnosis today.

Frequently asked questions

"Does Perplexity use Google's index?"

No. Perplexity combines its own search with Bing's index and real-time access to some sources. That's why being well indexed in Bing weighs so heavily for appearing there.

"Is SearchGPT just ChatGPT by another name?"

It's ChatGPT's search experience, which combines the model with web search results. It depends on indexable and accessible sources, which makes technical indexing even more important.

"How do I know if my site is indexed in Bing?"

Use the URL inspection tool in Bing Webmaster Tools. If the page isn't indexed there, your chances in Perplexity and Copilot drop significantly.

"Does a sitemap help AI find me?"

It helps AI discover and read your pages with priority, but it doesn't guarantee citation. A sitemap solves getting into the index; citable content solves getting recommended.

"Can robots.txt block the AIs?"

Yes. Blocks for search engine robots or rules against AI crawlers prevent these systems from reading your pages. It's worth checking that nothing is inadvertently closing off access.

Get your business into AI answers

Read also

Access Bincoo