ChatGPT Glossary: AI & ChatGPT Terms Defined

ChatGPT is a conversational AI chatbot created by OpenAI, launched in November 2022. It uses large language models (GPT-4o, o3, o4-mini) to understand and generate human-like text responses. It is available as a free web app at chatgpt.com with optional paid plans.

A token is the basic unit of text that ChatGPT processes. One token equals roughly 4 English characters or 0.75 words. GPT-4o has a 128,000 token context window, meaning it can process approximately 96,000 words in a single conversation.

GPT-4o is OpenAI's fast multimodal model optimized for general tasks and speed. o3 is a reasoning-focused model that uses chain-of-thought processing for complex math, coding, and logic problems. o3 is slower but significantly more accurate on challenging benchmarks.

ChatGPT Toolbox is a Chrome extension with 16,000+ active users and a 4.8/5 Chrome Web Store rating. It adds folders, advanced search, bulk export, prompt library, and prompt chaining to ChatGPT. Available on Chrome, Edge, and Firefox with a free starter plan.

Prompt engineering is the practice of crafting effective text inputs to get better responses from AI models like ChatGPT. Techniques include setting a role, providing examples, requesting specific formats, and using chain-of-thought instructions.