---
title: "I Built the Same AI Agent in 5 Frameworks: What Actually Changes (and What Doesn’t)"
url: https://daily.dev/posts/i-built-the-same-ai-agent-in-5-frameworks-what-actually-changes-and-what-doesn-t--gux7rg42j
source_url: https://www.gettingstarted.ai/i-built-the-same-ai-agent-in-5-frameworks-what-actually-changes-and-what-doesnt/
type: article
source: "Getting started with AI"
published: 2026-04-22T16:55:06.555Z
updated: 2026-04-22T16:55:32.270Z
tags: ["ai-agents", "mcp", "langgraph"]
reading_time: 9
upvotes: 0
comments: 0
language: 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.

# I Built the Same AI Agent in 5 Frameworks: What Actually Changes (and What Doesn’t)

**[Getting started with AI](https://daily.dev/sources/gettingstartedai)** · 9 min read · 0 upvotes · 0 comments

## Summary

A hands-on comparison of five AI agent frameworks — CrewAI, LangGraph, LlamaIndex, PydanticAI, and Microsoft Agent Framework — built around the same flight-assistant agent. The comparison covers agent setup, tool calling patterns, RAG integration, MCP wiring, and execution flow. Key findings: all frameworks share the same core mental model (agent + tools + run), RAG is effectively just another tool call, and MCP integration is where frameworks diverge most meaningfully. A practical decision guide helps match framework choice to your specific needs: orchestration structure, simple loops, or typed interfaces.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://www.gettingstarted.ai/i-built-the-same-ai-agent-in-5-frameworks-what-actually-changes-and-what-doesnt/>

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Tags: [#ai-agents](https://daily.dev/tags/ai-agents), [#mcp](https://daily.dev/tags/mcp), [#langgraph](https://daily.dev/tags/langgraph)

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