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LLMs
The brain — understands language and reasons
🧠 Think of it like a very smart human brain that can read, write, and reason — but needs hands to interact with the world.
A Large Language Model (LLM) is the intelligence core. It reads your messages, understands context, plans what to do next, and writes responses. On its own it can only generate text — it needs tools and agents to take real actions.
Step by step
- 1You send a message — the LLM reads every word
- 2It "thinks" by predicting the best next token, over and over
- 3It can decide to call a tool or just reply with text
- 4It never actually runs code or opens files — that happens outside it
Real example
You ask: "What's the weather in Paris?"
LLM reads your question
Decides it needs real-time data
Asks a weather tool to fetch it
Reads the result and replies in plain language
Known tools
GPT-4oClaude 3.5 SonnetGemini 1.5Llama 3
Use cases
Writing & summarizationCode completionQuestion answeringTranslation