What Is the Labrador Search Index?
Labrador Search Index is an unofficial name associated by independent researchers with an OpenAI search and retrieval index that ChatGPT can use when searching for information on the web. The Labrador label appeared in 2026 in technical data transmitted by ChatGPT as the source associated with some search results.
OpenAI has not publicly confirmed the Labrador name or the full architecture behind it. However, OpenAI officially documents OAI-SearchBot, its crawler used to surface websites in ChatGPT’s search features.
How Was the Labrador Search Index Discovered?
In 2026, researchers analyzing data transmitted by ChatGPT identified a field called result_source, which indicated the retrieval source associated with individual search results.
Observed values included:
- labrador,
- bright,
- oxylabs,
- serp.
Researchers associated Labrador with an internal OpenAI search index, while the other labels represented different retrieval mechanisms.
The result_source field disappeared from the observable data stream in July 2026. This means the current ChatGPT Search architecture can no longer be inspected in exactly the same way.
Is Labrador an Official OpenAI Search Index?
OpenAI’s use of web crawling for ChatGPT Search is officially documented through OAI-SearchBot.
However, OpenAI has not officially confirmed Labrador as the name of its search index or product.
Labrador should therefore be described as a researcher-observed technical label rather than an official OpenAI product name.
This distinction matters because AI retrieval infrastructure evolves quickly and not every internal component observed by researchers is publicly documented.
How Does the Labrador Search Index Work?
Independent research suggests that Labrador allows ChatGPT to retrieve previously indexed web information instead of relying exclusively on live Google or Bing search results for every query.
Researchers have also reported evidence of specialized indexes covering different content types, including:
- general web pages,
- news,
- PDFs,
- YouTube,
- academic content,
- local information,
- finance,
- shopping,
- images.
The complete architecture has not been officially documented by OpenAI.
Labrador Search Index vs. Google and Bing
Labrador should not be treated as a copy of Google or Bing’s index.
One of the key findings from 2026 research is that ChatGPT can use its own indexing infrastructure alongside other retrieval sources.
This means strong rankings in Google or Bing do not necessarily translate directly into identical visibility in ChatGPT.
At the same time, traditional search engines still matter. ChatGPT may use different sources depending on the query, information type, and current system configuration.
Labrador Search Index vs. OAI-SearchBot
Labrador Search Index and OAI-SearchBot are not the same thing.
OAI-SearchBot is OpenAI’s officially documented web crawler. It crawls websites so they can potentially appear in ChatGPT search results.
Labrador is the researcher-observed name associated with an indexing or retrieval layer used to return search results.
In simplified terms:
OAI-SearchBot crawls pages.
A search index stores information about discovered resources.
ChatGPT can retrieve information from an index when generating an answer.
However, an OAI-SearchBot crawl does not guarantee that a page will be stored in Labrador, retrieved for a query, or cited in a ChatGPT answer.
Labrador Search Index vs. GPTBot
OAI-SearchBot and GPTBot serve different purposes.
OAI-SearchBot is associated with search visibility in ChatGPT.
GPTBot is associated with web crawling that may support the development of OpenAI’s generative AI models.
Website owners can allow OAI-SearchBot while blocking GPTBot.
For websites focused on ChatGPT Search visibility, OAI-SearchBot access is therefore particularly relevant.
Can You Submit a Page to the Labrador Search Index?
There is currently no public tool for manually submitting a URL directly to the Labrador Search Index.
OpenAI does recommend allowing OAI-SearchBot to access websites that want to appear in ChatGPT Search.
Pages should also be:
- publicly accessible,
- crawlable,
- correctly served,
- connected through logical internal links,
- clear in their structure and meaning,
- kept up to date.
Allowing crawling does not guarantee inclusion or citations in ChatGPT-generated answers.
What Does Labrador Mean for SEO and AISO?
The most important implication of OpenAI developing its own indexing infrastructure is that ChatGPT visibility should not be measured solely through Google or Bing rankings.
Brands should consider:
- traditional SEO,
- OAI-SearchBot access,
- technical crawlability,
- clear information architecture,
- complete and current data,
- clear connections between information and brand entities,
- third-party sources used by AI systems.
This does not mean an entirely new optimization discipline replaces SEO fundamentals. Technically accessible, useful, well-structured information remains the foundation.
How Does Delante Approach the Labrador Search Index?
At Delante, we treat the discovery of the Labrador Search Index primarily as evidence that AI Search is developing into its own search layer and cannot be evaluated solely through Google or Bing rankings.
We do not optimize websites for a hypothetical “Labrador algorithm,” because OpenAI does not publish its ranking factors or full architecture.
Instead, we focus on elements brands can actually influence and measure:
- whether OAI-SearchBot can access the website,
- whether important content is crawlable,
- whether brand and offer information is complete and unambiguous,
- whether key pages are properly connected,
- whether important data is current,
- where the brand appears in ChatGPT answers,
- which sources are used for questions related to its category.
We therefore view Labrador as an important part of the evolving ChatGPT Search infrastructure while basing optimization decisions on observable and verifiable signals.
