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Home › Answers › Getting started with AI

How do AI chatbots and AI tools work?

Last checked: 17 October 2026 · The AI Till, UK

Short answer

An AI chatbot such as ChatGPT runs on a large language model, trained on huge amounts of text to predict which words are likely to come next. When you type a question, it writes an answer one piece at a time. Many can also search the web, read files and use tools, but they still don't truly "know" facts.

In four steps

  1. Training: the model learns patterns from vast amounts of text, then is tuned with human feedback to be helpful and safer.
  2. Your prompt: your message, plus earlier chat and any files, is split into small pieces called tokens.
  3. Generating: the model predicts the most likely next token, again and again, to build its reply.
  4. Tools: many chatbots can search the web, run code or use apps to get fresher or more accurate results.

Why they make mistakes

Because they predict plausible text, they can produce confident answers that are wrong, called hallucinations. Searching the web and citing sources helps, but you still need to check. See what is an AI hallucination?

Why the date matters

A model only knows what was in its training data unless it searches the web. See does ChatGPT have up-to-date information?

What this means for you

Give clear instructions and real details, and check facts, figures and legal points. See how to write a good ChatGPT prompt.

Related questions

Do AI tools learn from my chats?

Some can, depending on settings. See does AI save your data?

What is the difference between a chatbot and an agent?

An agent carries out multi-step tasks. See what is agentic AI?

Sources

Checked 17 October 2026. Rules and prices change, so check the source before you rely on it. This is general information, not legal, tax or financial advice.

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