A simple breakdown of the modern AI stack:
🧠 LLM = Brain — Thinks and generates text
📚 RAG = Brain + Books — Retrieves trusted knowledge
🛠️ AI Agent = Brain + Hands — Takes actions using tools
⚡ MCP = Nervous System — Connects models, APIs, and systems
In short: LLMs think, RAGs read, Agents act, MCP connects.
