One question, one plain-English answer. What is RAG? Does ChatGPT use it? RAG or fine-tuning? Beginner answers about Retrieval-Augmented Generation.https://what-is-rag.com/https://what-is-rag.com/blogs/rag-vs-ai-that-browses-the-web/https://what-is-rag.com/blogs/rag-vs-ai-that-browses-the-web/In kind, nothing — a browsing assistant is RAG with the web as its library. The difference is who chose that library, and it changes four things.Thu, 06 Aug 2026 00:00:00 GMTbasicsbeginnerscomparisonshttps://what-is-rag.com/blogs/does-rag-search-the-internet/https://what-is-rag.com/blogs/does-rag-search-the-internet/Usually not. RAG searches a collection of documents somebody deliberately pointed it at — though that collection can be the live web, and sometimes is.Wed, 05 Aug 2026 00:00:00 GMTbasicsbeginnershttps://what-is-rag.com/blogs/does-rag-make-ai-smarter/https://what-is-rag.com/blogs/does-rag-make-ai-smarter/No — it makes it better informed. RAG changes what the model can see, not how well it thinks. Knowing the difference saves a lot of wasted effort.Fri, 31 Jul 2026 00:00:00 GMTbasicsbeginnerscomparisonshttps://what-is-rag.com/blogs/why-cant-the-ai-find-it-in-my-document/https://what-is-rag.com/blogs/why-cant-the-ai-find-it-in-my-document/Usually one of three things: it never read that text, your wording missed the search step, or the question needs the whole file instead of a passage.Fri, 31 Jul 2026 00:00:00 GMTtroubleshootingbeginnershttps://what-is-rag.com/blogs/why-does-chatgpt-cite-sources-sometimes/https://what-is-rag.com/blogs/why-does-chatgpt-cite-sources-sometimes/Because it can only cite what it actually looked up. No links usually means it answered from memory — and there was nothing to link to.Thu, 30 Jul 2026 00:00:00 GMTbasicschatgptbeginnershttps://what-is-rag.com/blogs/why-does-the-ai-give-different-answers/https://what-is-rag.com/blogs/why-does-the-ai-give-different-answers/Two things vary: how the answer gets worded, and which sources got retrieved. Wording changes are normal. Facts that change are a warning sign.Thu, 30 Jul 2026 00:00:00 GMTtroubleshootingbasicsbeginnershttps://what-is-rag.com/blogs/how-do-ai-chatbots-search-the-web/https://what-is-rag.com/blogs/how-do-ai-chatbots-search-the-web/They write their own search query, open a handful of top results, and answer from the text on those pages. The pages they pick decide the answer.Wed, 29 Jul 2026 00:00:00 GMTbasicsbeginnershttps://what-is-rag.com/blogs/where-does-my-data-go-when-a-chatbot-reads-my-files/https://what-is-rag.com/blogs/where-does-my-data-go-when-a-chatbot-reads-my-files/Your file is copied, split up, stored in a searchable index, and sent to a model per question. Whose servers those are is the question to ask.Tue, 28 Jul 2026 00:00:00 GMTbeginnersprivacyhttps://what-is-rag.com/blogs/ai-agent-vs-rag/https://what-is-rag.com/blogs/ai-agent-vs-rag/RAG answers a question from documents. An agent decides what to do and does it — often using retrieval as one of its tools.Mon, 27 Jul 2026 00:00:00 GMTbasicsbeginnerscomparisonshttps://what-is-rag.com/blogs/is-rag-the-same-as-prompt-engineering/https://what-is-rag.com/blogs/is-rag-the-same-as-prompt-engineering/No. Prompt engineering changes how you ask; RAG changes what the model has to work with. Every RAG system does both.Sun, 26 Jul 2026 00:00:00 GMTbasicsbeginnerscomparisonshttps://what-is-rag.com/blogs/why-is-my-ai-assistant-giving-outdated-answers/https://what-is-rag.com/blogs/why-is-my-ai-assistant-giving-outdated-answers/Usually one of three causes: it answered from training memory, an old document is still indexed, or the index hasn't caught up with your edits.Sat, 25 Jul 2026 00:00:00 GMTtroubleshootingbeginnershttps://what-is-rag.com/blogs/what-is-a-knowledge-base-in-ai/https://what-is-rag.com/blogs/what-is-a-knowledge-base-in-ai/It's the document collection an AI is allowed to answer from — the library behind the assistant, and the ceiling on how good its answers get.Fri, 24 Jul 2026 00:00:00 GMTbasicsbeginnershttps://what-is-rag.com/blogs/does-chatgpt-use-rag/https://what-is-rag.com/blogs/does-chatgpt-use-rag/Sometimes. When ChatGPT searches the web or reads your uploaded files, that's RAG in action; plain answers from memory are not. Here's how to tell.Thu, 23 Jul 2026 00:00:00 GMTbasicschatgptbeginnershttps://what-is-rag.com/blogs/is-rag-machine-learning/https://what-is-rag.com/blogs/is-rag-machine-learning/Not by itself. RAG is a design pattern that wires machine-learning models together — no learning happens when a RAG system answers you.Thu, 23 Jul 2026 00:00:00 GMTbasicsbeginnershttps://what-is-rag.com/blogs/rag-vs-fine-tuning-which-do-you-need/https://what-is-rag.com/blogs/rag-vs-fine-tuning-which-do-you-need/Need the AI to know your facts? Use RAG. Need it to change how it behaves? Fine-tune. A plain-English rule of thumb, with the exceptions that matter.Thu, 23 Jul 2026 00:00:00 GMTcomparisonsfine-tuningbeginnershttps://what-is-rag.com/blogs/what-does-a-vector-database-do-in-rag/https://what-is-rag.com/blogs/what-does-a-vector-database-do-in-rag/A vector database is the searchable library in a RAG system: it stores documents as meaning-capturing numbers so the AI can find passages by meaning.Thu, 23 Jul 2026 00:00:00 GMTbasicsvector-databasesembeddingshttps://what-is-rag.com/blogs/what-is-rag-in-simple-terms/https://what-is-rag.com/blogs/what-is-rag-in-simple-terms/RAG (Retrieval-Augmented Generation) means an AI looks up relevant documents before answering. Here's the simple version, with a plain analogy.Thu, 23 Jul 2026 00:00:00 GMTbasicsbeginnershttps://what-is-rag.com/blogs/when-does-rag-give-wrong-answers/https://what-is-rag.com/blogs/when-does-rag-give-wrong-answers/RAG fails when it retrieves the wrong passages, the documents are wrong, or the model ignores what it read. The main failure modes, in plain English.Thu, 23 Jul 2026 00:00:00 GMTtroubleshootingbasicsbeginnershttps://what-is-rag.com/blogs/how-is-rag-different-from-a-search-engine/https://what-is-rag.com/blogs/how-is-rag-different-from-a-search-engine/A search engine hands you links to read. RAG contains a search engine, then writes the answer for you — which is both the benefit and the risk.Wed, 22 Jul 2026 00:00:00 GMTbasicsbeginnerscomparisonshttps://what-is-rag.com/blogs/chatbot-that-answers-from-my-own-documents/https://what-is-rag.com/blogs/chatbot-that-answers-from-my-own-documents/Yes, and you may not need to build anything. Ready-made tools do it today; the hard part is document quality, not technology.Tue, 21 Jul 2026 00:00:00 GMTbeginnersuse-caseshttps://what-is-rag.com/blogs/how-do-company-chatbots-know-company-policies/https://what-is-rag.com/blogs/how-do-company-chatbots-know-company-policies/They don't know them — they look them up. Your handbook is indexed, searched per question, and pasted into the AI's prompt before it answers.Mon, 20 Jul 2026 00:00:00 GMTbasicsbeginnersuse-caseshttps://what-is-rag.com/blogs/how-to-tell-if-an-ai-answer-is-accurate/https://what-is-rag.com/blogs/how-to-tell-if-an-ai-answer-is-accurate/You check the source, not the tone. Fluency tells you nothing — but a citation you can open tells you almost everything.Sun, 19 Jul 2026 00:00:00 GMTbeginnerstroubleshootinghttps://what-is-rag.com/blogs/why-do-ai-models-have-a-knowledge-cutoff/https://what-is-rag.com/blogs/why-do-ai-models-have-a-knowledge-cutoff/Training is a one-time snapshot of text, not a live feed. Once it ends, the model's knowledge freezes — which is exactly why retrieval exists.Sat, 18 Jul 2026 00:00:00 GMTbasicsbeginnershttps://what-is-rag.com/blogs/do-you-need-to-code-to-understand-rag/https://what-is-rag.com/blogs/do-you-need-to-code-to-understand-rag/No. RAG is a workflow — search, then answer — and every part of it can be understood without reading a single line of code.Fri, 17 Jul 2026 00:00:00 GMTbasicsbeginnershttps://what-is-rag.com/blogs/which-apps-use-rag/https://what-is-rag.com/blogs/which-apps-use-rag/Anything that answers from documents or the live web: AI search engines, support bots, coding assistants, note apps, and internal help desks.Thu, 16 Jul 2026 00:00:00 GMTbasicsbeginnersuse-caseshttps://what-is-rag.com/blogs/how-does-ai-know-which-documents-are-relevant/https://what-is-rag.com/blogs/how-does-ai-know-which-documents-are-relevant/It compares meanings, not words. Your question and every passage become points on a map, and the nearest ones get picked.Wed, 15 Jul 2026 00:00:00 GMTbasicsbeginnersembeddingshttps://what-is-rag.com/blogs/what-problem-does-rag-solve/https://what-is-rag.com/blogs/what-problem-does-rag-solve/AI models know a lot in general and nothing about your specific documents. RAG closes that gap without retraining anything.Tue, 14 Jul 2026 00:00:00 GMTbasicsbeginnershttps://what-is-rag.com/blogs/does-rag-stop-hallucinations/https://what-is-rag.com/blogs/does-rag-stop-hallucinations/It reduces them substantially but never eliminates them. RAG replaces guessing with reading — and adds a new way to be wrong from a real source.Mon, 13 Jul 2026 00:00:00 GMTbasicsbeginnerstroubleshootinghttps://what-is-rag.com/blogs/why-do-ai-chatbots-make-things-up/https://what-is-rag.com/blogs/why-do-ai-chatbots-make-things-up/Because they generate plausible text rather than looking facts up. A chatbot with no source guesses fluently, and a fluent guess sounds like a fact.Sun, 12 Jul 2026 00:00:00 GMTbasicsbeginnerstroubleshootinghttps://what-is-rag.com/blogs/difference-between-llm-and-rag/https://what-is-rag.com/blogs/difference-between-llm-and-rag/An LLM is the AI that writes text. RAG is a technique that feeds an LLM outside documents first. One is a thing, the other is a method.Sat, 11 Jul 2026 00:00:00 GMTbasicsbeginnerscomparisonshttps://what-is-rag.com/blogs/how-does-rag-work/https://what-is-rag.com/blogs/how-does-rag-work/RAG works in four steps: turn your question into a search, find matching passages, paste them into a hidden prompt, and let the AI answer.Fri, 10 Jul 2026 00:00:00 GMTbasicsbeginnershttps://what-is-rag.com/blogs/what-does-rag-stand-for/https://what-is-rag.com/blogs/what-does-rag-stand-for/RAG stands for Retrieval-Augmented Generation — the AI looks things up first, then writes its answer from what it found.Thu, 09 Jul 2026 00:00:00 GMTbasicsbeginners