What Is ChatGPT? OpenAI's Chatbot, Explained

ChatGPT is the conversational AI assistant built by OpenAI. You type a question or request in plain language and it writes, answers, summarizes, codes and reasons through problems for you. Launched at the end of 2022, ChatGPT became the fastest-growing consumer app in history and kicked off the mainstream generative-AI boom — it’s the product that put AI chatbots in front of hundreds of millions of people. If the technology underneath is new to you, start with our explainer on how AI chatbots work.

Where ChatGPT comes from

OpenAI is the San Francisco research company behind the GPT (“generative pre-trained transformer”) family of models. ChatGPT is the chat interface wrapped around those models. When it was released to the public in November 2022, its ability to hold a fluent conversation surprised even the industry — and within two months it had reached an estimated 100 million users, setting off the race that now includes Claude, Gemini and Grok.

What you can do with ChatGPT

ChatGPT has grown well beyond plain text chat. Depending on your plan, it can:

Write and edit — emails, essays, marketing copy, summaries and more.
Write and debug code across most popular programming languages.
Generate images through OpenAI’s image tools.
See, hear and speak — analyze images you upload and hold spoken voice conversations.
Browse the web to pull in current information and cite sources.
Analyze data and files — upload a spreadsheet or PDF and ask questions about it.

What makes ChatGPT different

A few things set ChatGPT apart from rival assistants:

The largest ecosystem. It has the widest feature set, the most third-party integrations and by far the most name recognition — for many people “ChatGPT” is shorthand for AI itself.
Custom GPTs. You can build tailored versions of ChatGPT for specific tasks without writing code, and browse a store of ones others have made.
A huge developer platform. The same models power thousands of other apps through OpenAI’s API.

How it compares to Claude and Grok

All the major assistants do broadly the same things, and the leaderboard shifts every time someone ships a new model. In practice:

ChatGPT (OpenAI) has the broadest feature set and ecosystem.
Claude (Anthropic) is widely favored for long-form writing, coding and careful reasoning — see what Claude is.
Gemini (Google) is woven into Google’s products and search.
Grok (xAI) leans on real-time data from X and a looser personality — see what Grok is.

The “best” one depends on the task. For a closer look, see our full ChatGPT vs Claude vs Grok comparison. When accuracy matters, it’s worth checking an answer across two assistants rather than trusting any single one.

Is ChatGPT free?

Yes — there’s a free tier with usage limits. Paid plans (such as ChatGPT Plus) raise those limits, unlock the most capable models and add features sooner, and developers pay per use through the API. Exact limits and pricing change often, so check OpenAI for current details.

Getting the most out of ChatGPT

Choosing an assistant is only half the story; the bigger productivity wins come from purpose-built tools layered on top of these models. If you want software tuned for a specific job — drafting, editing, SEO content — see our roundup of the best AI writing tools.

FAQ

Who makes ChatGPT?

ChatGPT is made by OpenAI, a San Francisco AI research company. It’s built on OpenAI’s GPT family of large language models.

What is ChatGPT used for?

People use it to write and edit text, brainstorm, write and debug code, summarize documents, generate images, analyze data and answer questions. It’s a general-purpose assistant rather than a single-task tool.

Is ChatGPT free to use?

Yes. There’s a free tier with usage limits, plus paid plans like ChatGPT Plus that raise the limits and unlock the most capable models. Developers can also pay per use through the API.

Is ChatGPT better than Claude?

Neither is universally “better.” ChatGPT has the broader ecosystem and feature set, while Claude is often preferred for long-form writing, coding and careful reasoning. The gap shifts with every new model release.

The AI field moves fast and model capabilities change frequently. This explainer reflects the current landscape and is reviewed periodically.