A Journey from AI to LLMs and MCP - 1 - What Is AI and How It Evolved Into LLMs

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Artificial Intelligence (AI) has become the defining technology of the decade. From chatbots to code generators, from self-driving cars to predictive text—AI systems are everywhere. But before we dive into the cutting-edge world of large language models (LLMs), let’s rewind and understand where this all began.

This post kicks off our 10-part series exploring how AI evolved into LLMs, how to enhance their capabilities, and how the Model Context Protocol (MCP) is shaping the future of intelligent, modular agents.

🧠 A Brief History of AI

The term “Artificial Intelligence” was coined in 1956, but the idea has been around even longer—think mechanical automatons and Alan Turing’s famous question: “Can machines think?”

AI development has gone through several distinct waves:

1. Symbolic AI (1950s–1980s)

Also known as “Good Old-Fashioned AI,” symbolic systems were rule-based. Think expert systems, logic programming, and hand-coded decision trees. These systems could play chess or diagnose medical conditions—if you wrote enough rules.

Limitations: Rigid, brittle, and poor at handling ambiguity.

2. Machine Learning (1990s–2010s)

Instead of coding rules manually, we trained models to recognize patterns from data. Algorithms like decision trees, support vector machines, and early neural networks emerged.

This era gave us:

Spam filters
Fraud detection
Recommendation engines

But while powerful, these models still had a hard time with natural language and context.

3. Deep Learning (2010s–Now)

With more data, better algorithms, and stronger GPUs, neural networks started outperforming traditional methods. Deep learning led to breakthroughs in:

Image recognition (CNNs)
Speech recognition (RNNs, LSTMs)
Language understanding (Transformers)

And that brings us to the latest evolution…

🧬 Enter LLMs: The Rise of Language-First AI

Large Language Models (LLMs) like GPT-4, Claude, and Gemini aren’t just another step in AI—they represent a leap. Trained on massive text corpora using transformer architectures, these models can:

Write essays and poems
Generate and debug code
Translate between languages
Answer complex questions

All by predicting the next word in a sentence.

But what makes LLMs so powerful?

🏗️ LLMs Are More Than Just Big Neural Nets

At their core, LLMs are massive deep learning models that turn tokens (words/pieces of words) into vectors (mathematical representations). Through billions of parameters, they learn the structure of language and the latent meaning within it.

Key components:

Tokenization: Breaking input into chunks the model can process
Embeddings: Mapping tokens to vector space
Attention Mechanisms: Letting the model focus on relevant parts of the input
Context Window: A memory buffer for how much input the model can “see”

Popular LLMs:

Model	Provider	Context Window	Notable Feature
GPT-4	OpenAI	Up to 128k	Code + natural language synergy
Claude 3	Anthropic	Up to 200k	Strong at instruction following
Gemini	Google DeepMind	~32k+	Multimodal capabilities

🧩 What LLMs Can (and Can’t) Do

LLMs are versatile and impressive—but they’re not magic. Their strengths come with real limitations:

✅ What they’re great at:

Text generation and summarization
Conversational interfaces
Programming assistance
Knowledge retrieval from training data

❌ What they struggle with:

Memory: No persistent memory across sessions
Context limits: Can only “see” a fixed number of tokens
Reasoning: Struggles with complex multi-step logic
Real-time data: Can’t access up-to-date or private information
Action-taking: Can’t interact with tools or APIs by default

This is where the next evolution comes in: augmenting LLMs with context, tools, and workflows.

🔮 The Road Ahead: From Models to Modular AI Agents

We’ve gone from rules to learning, from deep learning to LLMs—but we’re not done yet. The future of AI lies in making LLMs do more than just talk. We need to:

Give them memory
Let them interact with data
Enable them to call tools, services, and APIs
Help them make decisions and reason through complex tasks

This brings us to the idea of AI Agents—autonomous systems built on LLMs that can perceive, decide, and act.

🧭 Coming Up Next

In our next post, we’ll explore how LLMs actually work under the hood—digging into embeddings, vector spaces, and how models “understand” language.

Stay tuned.