GPT for Work is an add-on that works with Google Sheets and Google Docs. It supports all models including GPT-4, ChatGPT, and GPT-3. This tool can clean lists, extract entities, convert formats, edit, summarize, translate, classify, and generate ad creative, taglines, subject lines, outlines, blogs, and emails. GPT for Sheets is perfect for short text, while GPT for Docs is great for long-form content. The add-on is free, and the only cost is OpenAI.