ChatGPT is an AI chatbot from OpenAI that answers questions, writes, codes and more, in natural conversation. It is powered by a large language model and is the most widely used AI app in the world, with free and paid tiers.

What is ChatGPT?

ChatGPT is a conversational AI assistant. You type a question or request, and it responds in natural language — drafting text, explaining topics, writing code, generating images and more. It is built on OpenAI’s large language models and available on the web, in apps and via voice.

How does ChatGPT work?

ChatGPT is trained on vast amounts of text and learns to predict the most likely next words in a response. That lets it produce fluent, relevant answers. It does not look up facts in a database by default; it generates responses from learned patterns, which is why it can sometimes be wrong.

What are its plans and limits?

There is a free tier (which now shows ads in the US), plus Go ($8/mo), Plus ($20/mo) and Pro ($200/mo) for higher limits and the latest models. AI can fabricate facts, figures and citations with total confidence (a “hallucination”). Treat AI output as a draft and verify anything important against a reliable source — this matters most for medical, legal, financial and academic use. So treat ChatGPT as a capable assistant whose output you should verify, not an infallible source.

If you find yourself juggling a separate subscription for chat, automation, transcription and image generation, one option worth knowing is a single platform that runs them together — osFoundry is one such agentic AI platform that consolidates chat, agents and internal apps in one workspace, with a bring-your-own-key model so you choose the underlying AI.

This article is general information, not professional, legal or financial advice. AI tools, prices and availability change fast — verify current details on the official source before you rely on them.