The Chatbot You Already Know
ChatGPT, Claude, Gemini: what they are, how they work, and where they stop.
If you have ever typed a question into ChatGPT, asked Claude to write an email, or used Gemini to summarize a document, you have used an AI chatbot. It is the most common way people interact with AI today.
What Is an AI Chatbot?
An AI chatbot is a user-facing application that wraps an LLM in a conversational interface. You type. It responds. You ask a follow-up. It responds again. It is designed for back-and-forth dialogue.
Think of the LLM as the brain, and the chatbot as the body, the interface, the memory of your conversation, and the formatting that makes answers readable.
Chatbot vs. LLM: The Difference
- An LLM is the underlying AI model, the engine
- A chatbot is the product you interact with, the car
ChatGPT is a chatbot. GPT-4o is the LLM inside it. You can use the same LLM in many different products.
Every AI chatbot uses an LLM, but not every use of an LLM is a chatbot. LLMs also power search engines, code editors, document analyzers, and autonomous agents.
What Chatbots Are Great For
- Quick answers to questions
- Drafting emails, documents, and messages
- Brainstorming and ideation
- Explaining complex topics simply
- Summarizing long text you paste in
Where Chatbots Hit a Wall
Chatbots are powerful, but they have a fundamental limitation: they can only talk.
- They cannot open files on your computer
- They cannot send emails, post to social media, or update your CRM
- They cannot run multi-step workflows without you copy-pasting between steps
- They forget everything when you close the conversation
A chatbot is a brilliant advisor behind a glass wall. They can tell you what to do, but they cannot do it for you.
When a Chatbot Is Not Enough
If your AI needs are mostly ask questions and get text back, a chatbot is perfect. But the moment you need AI to actually perform tasks, open files, send messages, automate workflows, you have outgrown the chatbot. That is when you need an agent.
Extella goes beyond the chatbot. While you can chat with it, Extella can also execute tasks directly on your device, reading files, calling APIs, running automations, and saving results. Try Extella