--- title: Lab #3: Implementing RAG to build a “Chat with Multiple... description: This post explains how to build a 'Chat with Multiple PDFs' app using Retrieval-Augmented Generation (RAG), and covers its benefits, such as reducing model... canonical: https://daily.dev/posts/lab-3-implementing-rag-to-build-a-chat-with-multiple-pdfs-app-brhlvy4pw twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Lab #3: Implementing RAG to build a “Chat with Multiple PDFs” app | daily.dev og:description: This post explains how to build a 'Chat with Multiple PDFs' app using Retrieval-Augmented Generation (RAG), and covers its benefits, such as reducing model... og:url: https://daily.dev/posts/lab-3-implementing-rag-to-build-a-chat-with-multiple-pdfs-app-brhlvy4pw og:image: https://api.daily.dev/og/posts/BRHLVY4pw.png og:image:alt: Lab #3: Implementing RAG to build a “Chat with Multiple PDFs” app og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Lab #3: Implementing RAG to build a “Chat with Multiple PDFs” app **[GoPenAI](https://daily.dev/sources/gopenai)** · 8 min read · 22 upvotes · 2 comments ## Summary This post explains how to build a 'Chat with Multiple PDFs' app using Retrieval-Augmented Generation (RAG), and covers its benefits, such as reducing model hallucination and enhancing reliability. It details phases for pre-processing and inference, including loading, chunking, and embedding data into a vector database, and setting up a retrieval chain using Langchain and OpenAI integration. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@fasa** · 0 upvotes >  **@fasa** · 0 upvotes >  --- Tags: [#llm](https://daily.dev/tags/llm), [#openai](https://daily.dev/tags/openai), [#langchain](https://daily.dev/tags/langchain), [#rag](https://daily.dev/tags/rag) [View this post on daily.dev](https://daily.dev/posts/lab-3-implementing-rag-to-build-a-chat-with-multiple-pdfs-app-brhlvy4pw) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Lab #3: Implementing RAG to build a “Chat with Multiple PDFs” app","url":"https://daily.dev/posts/lab-3-implementing-rag-to-build-a-chat-with-multiple-pdfs-app-brhlvy4pw","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/lab-3-implementing-rag-to-build-a-chat-with-multiple-pdfs-app-brhlvy4pw"},"datePublished":"2024-07-03T11:10:21.374Z","dateModified":"2024-10-05T17:07:04.637Z","description":"This post explains how to build a 'Chat with Multiple PDFs' app using Retrieval-Augmented Generation (RAG), and covers its benefits, such as reducing model...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/13b6dac3efa06fb4de1d505461ef906d?_a=AQAEuiZ","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/13b6dac3efa06fb4de1d505461ef906d?_a=AQAEuiZ","isAccessibleForFree":true,"articleSection":"GoPenAI","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"GoPenAI","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/f34dfd0c312c4a59b897eb64ad28d895","url":"https://daily.dev/sources/gopenai"},"commentCount":2,"discussionUrl":"https://daily.dev/posts/lab-3-implementing-rag-to-build-a-chat-with-multiple-pdfs-app-brhlvy4pw","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":22},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":2}],"keywords":"llm,openai,langchain,rag","timeRequired":"PT8M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"GoPenAI","item":"https://daily.dev/sources/gopenai"},{"@type":"ListItem","position":3,"name":"Lab #3: Implementing RAG to build a “Chat with Multiple PDFs” app"}]} {"@context":"https://schema.org","@type":"WebPage","@id":"https://daily.dev/posts/lab-3-implementing-rag-to-build-a-chat-with-multiple-pdfs-app-brhlvy4pw","comment":[{"@type":"Comment","text":"","datePublished":"2024-09-30T17:32:45.248Z","url":"https://daily.dev/posts/BRHLVY4pw#c-R3dOJ9lE0","author":{"@type":"Person","name":"FA SA","url":"https://daily.dev/fasa","image":"https://media.daily.dev/image/upload/s--wmXVWu9i--/f_auto/v1727562625/avatars/avatar_Z44v23u0fyZHvnocRmzbc"}},{"@type":"Comment","text":"","datePublished":"2024-09-30T17:32:51.710Z","url":"https://daily.dev/posts/BRHLVY4pw#c-6qfWE1kWO","author":{"@type":"Person","name":"FA SA","url":"https://daily.dev/fasa","image":"https://media.daily.dev/image/upload/s--wmXVWu9i--/f_auto/v1727562625/avatars/avatar_Z44v23u0fyZHvnocRmzbc"}}]} ```