Last updated 08-10-2026
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GPT GhostWryter
GPT GhostWryter is a writing assistant add-on that runs inside Google Docs and sends your prompts to OpenAI through your own API key. You highlight text or enter keywords in the sidebar, pick a writing action, and generated copy lands directly in the document. It targets SEO articles, blog posts, essays, and marketing drafts without leaving Docs.
Most AI writers sell monthly word bundles and mark up API costs. GhostWryter charges a small add-on subscription and bills generation through your OpenAI account at token rates. That split keeps the fixed fee low while usage scales with what you actually write, which suits writers who spike output some weeks and go quiet in others.
The sidebar groups tools into idea research, drafting, and refinement. You can generate outlines, expand paragraphs, rewrite sections, list top questions, and run a custom Magic Command on highlighted text. Setup requires matching your GhostWryter signup email to your Google account and saving an OpenAI key in the add-on settings.
Runs as a Google Docs add-on with a sidebar for ideas, drafting, and refinement
Requires your own OpenAI API key so generation bills at OpenAI token rates
Loyal subscribers keep a $2.99/month add-on fee; returning users after cancel pay $7.99/month
Includes 20+ sidebar actions such as Outline Generator, Essay Writer, and Magic Command
Supports English, German, French, and Spanish in the add-on settings
Generation runs inside Google Docs, so drafts never leave your document workflow.
You bring your own OpenAI key, which keeps usage costs tied to actual token consumption.
The sidebar packs idea research, drafting, and rewrite tools into one add-on panel.
Requires both a GhostWryter subscription and a separate OpenAI API key to function.
Works only in Google Docs, not Word, Notion, or other editors.
Canceling once raises the monthly add-on fee from $2.99 to $7.99 if you return.
What is GPT GhostWryter?
GPT GhostWryter is a Google Docs add-on that connects OpenAI models to your documents. You highlight text or enter keywords, choose a sidebar action, and GPT GhostWryter inserts generated copy into the doc using your own OpenAI API key.
How much does GPT GhostWryter cost?
GPT GhostWryter charges $2.99 per month for subscribers who never cancel, or $7.99 per month if you leave and return later. You also pay OpenAI directly for token usage through your API key.
Does GPT GhostWryter offer a free trial?
GPT GhostWryter does not offer a free trial. You can cancel within the first three days of ordering for a full $2.99 refund, and you can cancel the monthly subscription at any time.
Which platforms does GPT GhostWryter support?
GPT GhostWryter works only inside Google Docs as a Google Workspace Marketplace add-on. You install it from Extensions, then launch it from the Extensions menu in any document.
What languages does GPT GhostWryter support?
GPT GhostWryter supports English, German, French, and Spanish in the add-on settings. You select the language in the sidebar gear tab before generating text.
Why does GPT GhostWryter need an OpenAI key?
GPT GhostWryter routes requests to OpenAI models through your personal API key. That pay-as-you-go setup bills you per token instead of locking you into a bundled word cap from a middleman service.