| Tier | Typical use | Supply | Proof standing | What the proof says | Reference |
|---|
| 1 | Net & search discovery | Google Search | Confirmed + present | Grounding with Google Search connects Gemini to real-time net content material, returning inline citations to supply URLs. | Google — Gemini API docs, Grounding with Google Search |
| 1 | Bing Search | Confirmed + present | Microsoft paperwork Bing outcomes getting used to boost Copilot responses. Not re-verified on this go. | Microsoft Bing |
| 3 | Widespread Crawl | Confirmed historic | GPT-3 used filtered Widespread Crawl as roughly 60% of its sampling combination; LLaMA 1 reported 67%. | Common Crawl |
| 3 | Historic net corpora (C4 and so forth.) | Confirmed historic | C4 is a cleaned by-product of Widespread Crawl; LLaMA reported C4 at 15% of its pretraining combination. | TensorFlow Datasets — C4 |
| 4 | Net grounding providers | Robust proof / probably | Class inference protecting third-party grounding/retrieval intermediaries. No single canonical supply. | — |
| 1 | Merchandise & procuring | Google Service provider Heart | Confirmed + present | Service provider feed information underpins Google’s procuring surfaces. Retained on person instruction; Google Procuring eliminated as it’s a floor, not a supply. | Google Merchant Center Help |
| 2 | Service provider / retail feeds (OpenAI) | Confirmed + present | Retailers share a safe, usually refreshed CSV/JSON feed of identifiers, descriptions, pricing, stock, media and fulfilment so ChatGPT can floor merchandise precisely. Refreshes accepted as typically as each quarter-hour. | OpenAI Developers — Agentic Commerce, product feeds |
| 4 | Microsoft Service provider Heart | Robust proof / probably | Equal industrial feed infrastructure; inferred parallel to Google Service provider Heart relatively than individually evidenced. | — |
| 4 | Market feeds | Robust proof / probably | Class inference. Shopify catalog information is already built-in into ChatGPT, which helps the sample. | OpenAI Help — Shopping with ChatGPT Search |
| 1 | Native & locations | Google Maps | Confirmed + present | Grounding with Google Maps is a documented software alongside Search grounding, giving fashions geospatial context. | Google Cloud — Grounding API |
| 1 | Google Enterprise Profile | Confirmed + present | Enterprise profile information feeds Google’s native surfaces. Carried from the supply desk; not individually re-verified. | — |
| 1 | Yelp | Confirmed + present | Yelp licenses critiques, images and enterprise data to OpenAI for real-time native suggestions. Past grounding it additionally drives actions: ChatGPT customers can guide a desk or be a part of a waitlist, and Request a Quote lets customers contact suppliers in-chat. Yelp’s 10-Q confirms it’s reside. | Axios; Yelp blog; Yelp 10-Q FY2026 |
| 4 | OpenStreetMap | Robust proof / probably | Extensively used open geospatial corpus; inferred relatively than confirmed for any named mannequin. | — |
| 4 | Foursquare | Robust proof / probably | Left in Tier 4 intentionally: the OpenAI deal is Yelp’s, and no equal proof exists for Foursquare. | — |
| 4 | Tripadvisor | Robust proof / probably | Class inference for evaluation/journey information. No confirmed deal recognized on this go. | — |
| 1 | Data & reference | Wikipedia | Confirmed + present | Explicitly current in GPT-3’s disclosed combination and LLaMA (June-Aug 2022 dumps, 20 languages); additionally broadly used as a reside reference/RAG corpus. | Wikimedia dumps |
| 1 | Wikimedia | Confirmed + present | Identical corpus household as Wikipedia. Licensing is unusually clear: principally CC BY-SA with attribution/share-alike obligations. | Wikimedia dumps |
| 4 | Wikidata | Robust proof / probably | Structured entity layer; strongly implied by knowledge-graph use however not individually confirmed. | — |
| 1 | Neighborhood / Q&A / social | Reddit | Confirmed + present | The Google deal gave entry to the Reddit Information API for ‘real-time, structured, distinctive content material’, and permits Reddit content material to be displayed throughout Google merchandise — i.e. reside grounding, not solely coaching. | Tom’s Guide (Google/Reddit deal) |
| 2 | Reddit | Confirmed + present | Identical deal, coaching aspect: Google could use Reddit posts to coach its AI fashions and enhance providers equivalent to Search; reported at roughly $60m/yr. NOTE: Reddit is reportedly weighing whether or not to resume — deal with as unstable. | Fortune; Neowin/WSJ on renewal doubt |
| 4 | Social platforms | Robust proof / probably | Class inference protecting platform-wide social corpora. | — |
| 4 | Boards / communities | Robust proof / probably | Class inference. Overlaps Reddit however generalised to non-Reddit boards. | — |
| 1 | Information & writer content material | Reside writer pages | Confirmed + present | Reached at inference time by way of search grounding relatively than pretraining; retrieval choice and crawlability govern inclusion. | Google — Grounding with Google Search |
| 2 | Licensed writer content material | Confirmed + present | OpenAI has a number of express licensing partnerships (FT, Axel Springer, AP, Information Corp). Phrases differ per associate on coaching vs grounding vs attribution. | OpenAI — FT content partnership |
| 2 | Writer partnerships | Confirmed + present | Axel Springer’s deal consists of in any other case paywalled materials in solutions; AP licensed a part of its textual content archive. | OpenAI — Axel Springer partnership |
| 3 | Historic information corpora | Confirmed historic | Archive materials absorbed in pretraining; distinct from reside licensed entry. | — |
| 2 | Developer / technical | GitHub | Confirmed + present | LLaMA used GitHub’s public BigQuery dataset, restricted to Apache/BSD/MIT tasks; The Pile individually consists of GitHub. Public visibility is just not an open licence. | GitHub |
| 2 | Stack Overflow | Confirmed + present | Named in licensing-deal mapping alongside Reddit and Shutterstock as an information platform powering a number of patrons. | LLM Pulse — AI content licensing deals mapped |
| 2 | Technical docs | Confirmed + present | Vendor documentation corpora; broadly used however not tied to a single disclosed settlement. | — |
| 4 | npm / PyPI registries | Robust proof / probably | WEAKEST ENTRY IN THE TABLE. Relabelled from ‘bundle registries’ to call examples. No disclosed settlement or documented retrieval use discovered — contemplate chopping. | — |
| 1 | Journey & commerce actions | Google Resort Heart feeds | Confirmed + present | When Gemini or AI Mode present resort choices with real-time costs, that information comes from the Google Motels feed. In Aug 2026 Google added resort reserving inside AI Mode accomplished with Google Pay, so that is grounding plus actions. | TechCrunch — AI Mode travel update |
| 4 | Reserving / associate feeds | Robust proof / probably | Reserving Holdings and IHG are reported as members in Google’s agentic reserving pilot, which helps the course however stops wanting a documented feed spec. | InfosTourisme (IHG/Booking pilot) |
| 4 | OTA / commerce sources | Robust proof / probably | Class inference. OTAs run their very own charge feeds into these surfaces. | — |
| 4 | Reservation / stock APIs | Robust proof / probably | Class inference protecting reserving/stock endpoints uncovered to brokers. | — |