--- title: How to Build a Q&A LLM Application with LangChain and Gemini description: This tutorial explains how to build a Q&A LLM application using LangChain and Gemini. It covers steps for initializing the environment, importing modules,... canonical: https://daily.dev/posts/how-to-build-a-q-a-llm-application-with-langchain-and-gemini-8fc80eqvw twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How to Build a Q&A LLM Application with LangChain and Gemini | daily.dev og:description: This tutorial explains how to build a Q&A LLM application using LangChain and Gemini. It covers steps for initializing the environment, importing modules,... og:url: https://daily.dev/posts/how-to-build-a-q-a-llm-application-with-langchain-and-gemini-8fc80eqvw og:image: https://api.daily.dev/og/posts/8fC80eqVW.png og:image:alt: How to Build a Q&A LLM Application with LangChain and Gemini og:image:width: 1200 og:image:height: 630 og:locale: en --- [The New Stack](https://daily.dev/sources/newstack) [Read post](https://api.daily.dev/r/8fC80eqVW) # [How to Build a Q&A LLM Application with LangChain and Gemini](https://api.daily.dev/r/8fC80eqVW "Go to post") This tutorial explains how to build a Q&A LLM application using LangChain and Gemini. It covers steps for initializing the environment, importing modules, initializing models, loading and splitting the PDF, configuring the retriever and defining the retrieval chain, and invoking the chain. [#python](/tags/python "Check all #python posts")[#qa](/tags/qa "Check all #qa posts")[#langchain](/tags/langchain "Check all #langchain posts") Mar 26, 2024•5m read time•From [thenewstack.io](https://api.daily.dev/r/8fC80eqVW "thenewstack.io") [](https://api.daily.dev/r/8fC80eqVW "Go to post") Table of contents [Step 1: Initializing the Environment](https://api.daily.dev/r/8fC80eqVW "Step 1: Initializing the Environment")[Step 2: Import Modules](https://api.daily.dev/r/8fC80eqVW "Step 2: Import Modules")[Step 3: Initialize the Models](https://api.daily.dev/r/8fC80eqVW "Step 3: Initialize the Models")[Step 4: Load and Split the PDF](https://api.daily.dev/r/8fC80eqVW "Step 4: Load and Split the PDF")[Step 5: Initialize VectorDB and Configure Retriever](https://api.daily.dev/r/8fC80eqVW "Step 5: Initialize VectorDB and Configure Retriever")[Step 6: Define the Retrieval Chain](https://api.daily.dev/r/8fC80eqVW "Step 6: Define the Retrieval Chain")[Step 7: Invoke the Chain](https://api.daily.dev/r/8fC80eqVW "Step 7: Invoke the Chain") 8 Impressions1 Upvote Comment Bookmark Copy Share your thoughtsPost [](https://daily.dev/sources/newstack) [The New Stack](https://daily.dev/sources/newstack "https://daily.dev/sources/newstack") The New Stack is a publication covering trends and technologies in cloud-native development, DevOps,... Read more 1.4K Followers • 14.2K Upvotes #### Would you recommend this post? Copy link WhatsApp Facebook X New Squad Copy linkShare with your friends 1 ```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":"How to Build a Q&A LLM Application with LangChain and Gemini","url":"https://daily.dev/posts/how-to-build-a-q-a-llm-application-with-langchain-and-gemini-8fc80eqvw","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-to-build-a-q-a-llm-application-with-langchain-and-gemini-8fc80eqvw"},"datePublished":"2024-03-26T09:04:34.358Z","dateModified":"2024-05-09T08:43:33.910Z","description":"This tutorial explains how to build a Q&A LLM application using LangChain and Gemini. It covers steps for initializing the environment, importing modules,...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/1fa1952446edda8a8d58c8536890efef?_a=AQAEufR","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/1fa1952446edda8a8d58c8536890efef?_a=AQAEufR","isAccessibleForFree":true,"articleSection":"The New Stack","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":"The New Stack","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/newstack","url":"https://daily.dev/sources/newstack"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/how-to-build-a-q-a-llm-application-with-langchain-and-gemini-8fc80eqvw","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"python,qa,langchain","timeRequired":"PT5M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"The New Stack","item":"https://daily.dev/sources/newstack"},{"@type":"ListItem","position":3,"name":"How to Build a Q&A LLM Application with LangChain and Gemini"}]} ```