--- title: Building LLM Agents Using LangChain & OpenAI API | daily.dev description: This post provides a guide on building LLM Agents using LangChain and OpenAI API. It explains how the agents work and the various tasks they can perform. canonical: https://daily.dev/posts/building-llm-agents-using-langchain-openai-api-ccyptzmmb twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Building LLM Agents Using LangChain & OpenAI API | daily.dev og:description: This post provides a guide on building LLM Agents using LangChain and OpenAI API. It explains how the agents work and the various tasks they can perform. og:url: https://daily.dev/posts/building-llm-agents-using-langchain-openai-api-ccyptzmmb og:image: https://api.daily.dev/og/posts/ccyPTZMMB.png og:image:alt: Building LLM Agents Using LangChain & OpenAI API 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. # Building LLM Agents Using LangChain & OpenAI API **[Towards AI](https://daily.dev/sources/tai)** · 2 min read · 13 upvotes · 1 comments ## Summary This post provides a guide on building LLM Agents using LangChain and OpenAI API. It explains how the agents work and the various tasks they can perform. ## 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. **@kartiknvj** · 0 upvotes > LangGraph is solid but the eval story is weak. I wrap every node with a traceAI span and run trajectory evals on the full graph, not per-node. Catches the "node A correct, node B correct, but A→B handoff broken" failures. ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments --- Tags: [#ai](https://daily.dev/tags/ai), [#openai](https://daily.dev/tags/openai), [#langchain](https://daily.dev/tags/langchain) [View this post on daily.dev](https://daily.dev/posts/building-llm-agents-using-langchain-openai-api-ccyptzmmb) ```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":"Building LLM Agents Using LangChain & OpenAI API","url":"https://daily.dev/posts/building-llm-agents-using-langchain-openai-api-ccyptzmmb","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/building-llm-agents-using-langchain-openai-api-ccyptzmmb"},"datePublished":"2024-05-13T05:19:36.344Z","dateModified":"2024-05-13T05:19:35.359Z","description":"This post provides a guide on building LLM Agents using LangChain and OpenAI API. 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