What Is RAG? Retrieval-Augmented Generation Explained

RAG is retrieval-augmented generation: an AI pattern that lets language models search outside knowledge before answering, with strengths and limits.

RAG is retrieval-augmented generation: an AI pattern that lets language models search outside knowledge before answering, with strengths and limits.

OpenAI is the AI research and deployment company behind ChatGPT. Learn its mission, structure, products, and why it matters.

Prompt engineering is the skill of writing clear AI instructions. Learn how prompts work, which skills matter, and whether prompt engineering is a career.

Multimodal AI explained in plain English: how models combine text, images, audio, and video, where ChatGPT fits, and what the limits are.

A token in ChatGPT is a piece of text the model reads and writes. Learn how tokens relate to words, context limits, costs, and prompt length.

ChatGPT is owned by OpenAI. Learn how the OpenAI Foundation, OpenAI Group PBC, Microsoft, employees, and 2026 investors fit into the ownership structure.

A large language model, or LLM, is an AI model trained to process and generate language. Learn how LLMs work, what they can do, and where they fail.

Generative AI creates new text, images, audio, video, code, and more from prompts. Learn how it works, where ChatGPT fits, and how to use it safely.

GPT stands for Generative Pre-trained Transformer. Learn what each word means, how GPT differs from ChatGPT, and why the acronym matters.

A plain-English guide to context windows in AI: what they are, how token limits work, why models forget, and how to manage long prompts.

ChatGPT was created by OpenAI and publicly launched on November 30, 2022. Learn the origin story, GPT lineage, and key dates behind ChatGPT.

ChatGPT is OpenAI's conversational AI assistant. Learn what it does, how it works, what GPT means, and its limits in plain English.