ChatGPT Glossary

*OpenAI*'s consumer-facing AI assistant product, launched November 2022. The market-defining product that introduced the general public to large-language-model chatbots.

ChatGPT is OpenAI’s consumer-facing AI assistant product. The original version launched November 30, 2022, with an initial free tier built on the GPT-3.5 model, and reached 100 million users in two months — the fastest-growing consumer software product in history at the time. The product has since gone through multiple model upgrades (GPT-4 in March 2023, GPT-4o and GPT-4-Turbo in 2024, GPT-5 in 2025), the addition of voice, image generation, web browsing, file uploads, custom GPTs, and the broader ChatGPT Plus/Team/Enterprise/Education subscription tiers.

For this Dictionary, ChatGPT is the market-defining product — the AI experience the general public knows, and the comparator readers will reach for when trying to understand any other AI product. Most readers of this Dictionary have used ChatGPT; many use it daily. The Dictionary’s editorial position on ChatGPT is broadly neutral: it is a competent product, the November 2022 launch was a genuine watershed event for the field, and the operator of this Dictionary does not use it as a daily driver (defaulting to Claude via API for cooperative writing and to local Hermes / Gemma / Qwen for sovereignty-critical work).

ChatGPT’s UX conventions — the chat interface, the threaded conversation, the Send button, the regenerate option — have become the de facto standard pattern for AI applications, including most enterprise and consumer products launched since 2023.

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