---
title: "Discussion on \"The Architecture of Modern AI: Models, Agents, Vector Databases, and MCP\" | Hashnode"
description: "Discussion on \"The Architecture of Modern AI: Models, Agents, Vector Databases, and MCP\". A practical field guide to the concepts, architectures, and free-versus-professional tools behind production AI systems."
url: "https://hashnode.com/posts/the-architecture-of-modern-ai-models-agents-vector-databases-and-mcp/6aeda32a77cc2fcbe2af410b"
---

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# [The Architecture of Modern AI: Models, Agents, Vector Databases, and MCP](https://hosseinhezami.hashnode.dev/the-architecture-of-modern-ai-models-agents-vector-databases-and-mcp?utm_source=hashnode&utm_medium=feed)

A practical field guide to the concepts, architectures, and free-versus-professional tools behind production AI systems.

3d ago · 24 min read · hosseinhezami.hashnode.dev  
Read the article

-   [#ai](https://hashnode.com/tag/ai)
-   [#ai-tools](https://hashnode.com/tag/ai-tools)
-   [#ai-agents](https://hashnode.com/tag/ai-agents)
-   [#ai-agent](https://hashnode.com/tag/ai-agent)
-   [#rag](https://hashnode.com/tag/rag)
-   [#mcp](https://hashnode.com/tag/mcp)
-   [#mcp-server](https://hashnode.com/tag/mcp-server)
-   [#mcp-client](https://hashnode.com/tag/mcp-client)
-   [#mcp-host](https://hashnode.com/tag/mcp-host)
-   [#mcp-security](https://hashnode.com/tag/mcp-security)
-   [#embeddings](https://hashnode.com/tag/embeddings)
-   [#llm](https://hashnode.com/tag/llm)
-   [#security](https://hashnode.com/tag/security)
-   [#aimodels](https://hashnode.com/tag/aimodels)
-   [#agentic-ai](https://hashnode.com/tag/agentic-ai)

## Written by

[Hossein Hezami](https://hashnode.com/@hosseinhezami)

@hosseinhezami · New York, USA

  
[View profile](https://hashnode.com/@hosseinhezami)

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