Chatbot: A chatbot is software you converse with by typing or speaking. Older chatbots followed scripted decision trees; modern AI chatbots such as ChatGPT, Claude, Gemini, and Copilot use large language models to understand and respond to almost any request.
The word covers two very different things. The support bot that asked you to 'press 1 for billing' was a rules-based chatbot: it matched keywords to a fixed menu and broke the moment you went off script. An LLM-based chatbot has no script. It reads what you wrote, in any phrasing, and composes a reply.
That flexibility is why general-purpose assistants became everyday tools for drafting, summarizing, analysis, and research. It also reaches customer-facing bots: a modern support chatbot can be given your help articles and policies through retrieval and answer real questions, hand off to a person when it is unsure, and log what it could not resolve.
Two things to keep in mind. A chatbot's confidence does not indicate accuracy, so check facts before acting on them. And what you type into a consumer chatbot may be stored or reviewed by the vendor, so never paste confidential client, patient, or employee information unless your organization has approved that specific tool.
Example at work
A dental office replaces its scripted website bot with an LLM-based one that has access to hours, services, insurance accepted, and the appointment scheduling link. It answers questions in plain language, never quotes prices it has not been given, and routes anything clinical to a staff callback the next business day.
Why it matters
Chatbots are the front door to AI for most professionals, both as a personal assistant and as a customer-facing tool. Knowing the difference between a scripted bot and an LLM-based one helps you set expectations for what each can handle and where a person needs to step in.
Related terms
- Large language model (LLM)A large language model (LLM) is a neural network trained on enormous amounts of text to predict the next word, then tuned to follow instructions and hold a conversation. LLMs power ChatGPT, Claude, Gemini, and Microsoft Copilot.
- CopilotA copilot is an AI assistant built into the software you already use, suggesting, drafting, and completing work alongside you rather than replacing you. Copilot is also Microsoft's brand for its AI assistants across Windows, Microsoft 365, and GitHub.
- System promptA system prompt is a set of instructions given to an AI model before a conversation starts that defines its role, tone, rules, and boundaries. Vendors write one for their products; you can add your own in custom instructions, projects, and custom assistants.
- HallucinationA hallucination is when an AI model produces information that is false or fabricated but presents it confidently, such as an invented statistic, a citation to a paper that does not exist, or a made-up product feature.
- Data privacyData privacy, in the context of AI, is the set of rules and practices that govern what information you put into an AI system, who can see it, how long the vendor keeps it, and whether it is used to train future models.