ChatGPT is the AI assistant made by OpenAI. It is the product that, more than any other, introduced large-scale conversational AI to a general audience: a chat window where a person can ask a question, request a draft, paste in a document, or hold an extended back-and-forth conversation, and receive fluent, generated responses in return. It is built on top of OpenAI's large language models, but ChatGPT itself is the assistant — the interface, the memory, the tools, and the product decisions layered on top of the underlying model.
What ChatGPT is
At its core, ChatGPT is a chat interface to a large language model: a system trained to predict and generate text based on patterns learned from very large amounts of training data. What makes it an assistant rather than a raw model is everything OpenAI has built around that core — instruction-following behavior tuned through additional training, a conversational memory system, the ability to call tools such as web browsing and code execution, and a product surface available on the web, in dedicated desktop and mobile apps, and through an API that developers can build on.
ChatGPT is not a single fixed model. OpenAI routes different requests to different underlying models depending on the plan a person is on and the complexity of the task, ranging from faster, lighter models tuned for everyday chat to slower, more deliberate reasoning models tuned for harder problems. The name “ChatGPT” refers to the product as a whole, not to any one model version.
Who makes it and when it launched
ChatGPT is made by OpenAI, the San Francisco-based AI research and product company that also develops the GPT family of language models, the Sora video generation system, and the Codex coding agent. OpenAI released ChatGPT to the public on November 30, 2022, initially framed as a free research preview built on a fine-tuned version of its GPT-3.5 model. Public reaction was immediate and unusually large: ChatGPT is widely cited as one of the fastest consumer applications ever to reach tens of millions of users, and its release is often treated as the moment large language models moved from a research topic into mainstream awareness.
Since that launch, OpenAI has repeatedly updated the models underneath ChatGPT and added capabilities the original text-only preview did not have, including image generation and analysis, voice conversation, web browsing, file handling, code execution, persistent memory, and support for custom, purpose-built versions of the assistant called GPTs.
What it's good at
ChatGPT is a general-purpose writing and reasoning tool. It is commonly used to draft and edit emails, articles, and other documents; brainstorm and outline ideas; summarize long text; explain unfamiliar topics; translate between languages; and answer everyday questions. Because OpenAI has invested heavily in coding-focused training and tools such as Codex, it is also widely used for writing, explaining, and debugging code, and for working through multi-step technical problems.
Beyond text, ChatGPT can generate and edit images from a written description, hold spoken voice conversations, read and analyze uploaded files, spreadsheets, and images, browse the web for information that postdates its training, and run code in a sandboxed environment to do calculations, generate charts, or process data. Paid tiers add persistent memory of past conversations, the ability to organize related chats into projects, scheduled recurring tasks, and custom GPTs that package instructions, files, and tools into a reusable, purpose-built version of the assistant. Its scale of adoption also means it has one of the largest third-party ecosystems of guides, integrations, and custom GPTs built around it.
Where it falls short
ChatGPT shares the core limitations of every large language model. It generates the most statistically plausible continuation of a conversation, not a verified fact, so it can state something confidently that is simply wrong — an error commonly called hallucination. This matters most for names, dates, citations, and numbers a person has not independently checked. Its knowledge of the world is also bounded by a training cutoff; without using its web-browsing tool, it does not know about events after that point, and even with browsing enabled it can retrieve and summarize a source incorrectly.
Access is also tiered in ways that shape the practical experience: the free plan carries usage limits on messages, file uploads, image generation, and voice, and access to OpenAI's more capable reasoning models is reserved for paid plans. Long or highly technical conversations can run into the limits of how much conversation history the assistant can usefully hold at once, and like other AI assistants, it can be inconsistent when a prompt is reworded, and it is not a substitute for expert review on legal, medical, financial, or other high-stakes decisions.
| Maker | OpenAI |
|---|---|
| Launched | November 30, 2022 (public release) |
| Access | Web (chatgpt.com), desktop apps, iOS and Android apps, and a developer API |
| Underlying models | OpenAI's GPT model family; ChatGPT routes between faster everyday models and more capable reasoning models depending on plan and task |
| Multimodal | Yes — text, image generation and analysis, voice conversation, file and document analysis, and code execution are all supported, with the extent varying by plan |
| Free tier | Yes, with usage limits on messages, uploads, image generation, voice, and memory |
| Paid tiers | Go, Plus, Pro, Business, and Enterprise, priced per user per month with each tier raising usage limits and unlocking more capable models and features; consult openai.com/chatgpt/pricing for current prices, which change over time |
| Context handling | Varies by model and plan; paid tiers offer meaningfully larger conversational memory and context than the free tier, though exact figures differ by model and are not fixed |
| Best known for | Being the product that brought conversational AI to a mass audience, its custom GPTs ecosystem, and broad general-purpose writing, reasoning, and coding assistance |
Frequently asked questions
What is ChatGPT?
ChatGPT is an AI assistant made by OpenAI. It is a chat interface built around OpenAI's large language models, letting people ask questions, draft and edit text, analyze files, generate images, and get help with code and reasoning through a back-and-forth conversation on the web, in desktop and mobile apps, or through OpenAI's API.
Who makes ChatGPT and when did it launch?
ChatGPT is made by OpenAI, the San Francisco-based AI research company behind the GPT model family. OpenAI released ChatGPT to the public on November 30, 2022, initially as a free research preview, and it became one of the fastest-adopted consumer software products in history.
Is ChatGPT free to use?
Yes. OpenAI offers a free tier of ChatGPT with unlimited text chats subject to abuse guardrails, along with limited access to file uploads, image generation, voice, and memory. Paid plans, currently Go, Plus, Pro, Business, and Enterprise, remove or raise those limits and add more capable reasoning models and features.
What can ChatGPT do besides answer text questions?
Beyond conversational text, ChatGPT can generate and edit images, have spoken voice conversations, browse the web for current information, read and analyze uploaded files and images, write and run code, remember details across conversations, organize work into projects, run scheduled tasks, and use custom GPTs built for specific purposes.
What are ChatGPT's main limitations?
Like other large language model assistants, ChatGPT can state incorrect information confidently, an error called hallucination, and its knowledge has a training cutoff unless it browses the web. Free and lower-priced tiers face usage limits, and very complex or highly specialized tasks may still require expert human review.
How is ChatGPT different from Claude, Gemini, and other AI assistants?
ChatGPT, Claude, Gemini, Microsoft Copilot, Perplexity, Grok, and Meta AI are all AI assistants built on large language models, but each is made by a different company, trained differently, and tuned toward different strengths, interfaces, and integrations. ChatGPT is distinguished by its scale of adoption, its custom GPTs ecosystem, and deep integration with OpenAI's broader model lineup.
More from highlevel.ai
See how ChatGPT compares to the rest of the field in the AI chatbot comparison, which covers ChatGPT, Claude, Gemini, Microsoft Copilot, Perplexity, Grok, and Meta AI. For background on the technology underneath it, read what a large language model is, how AI works, and what AI agents are.