The original title is "From ChatGPT to AI Agents: What Actually Changed Between 2022 and 2026"

Short summary

A layered walkthrough of how AI evolved from ChatGPT (Nov 2022) to hosted agent infrastructure (2026), explaining each invention—RAG, function calling, reasoning models, MCP, and agent skills—in the order they arrived and what each layer unlocked. Written for people who have used ChatGPT but never used an AI agent, it trades technical precision for intuition so that nothing an agent does feels like magic. The core thesis is that every layer exists because the one before it wasn't enough.

• •Chronological map of AI milestones from ChatGPT to agent infrastructure (2022–2026)
• •Explains LLMs, context windows, RAG, function calling, reasoning models, and MCP in plain language
• •Each layer exists to compensate for limitations of the previous one, especially hallucination

Generated with AI, which can make mistakes.