How to use Grammarly AI writing assistant: account, generative AI, extension, Editor, plan limits

Sign up → enable Generative AI → extension lightbulb or Editor → check Premium/Pro monthly prompts and Mac daily cap.

You want Grammarly generative AI: sign up at grammarly.com, turn on Generative AI under Feature customization or the browser extension dropdown, then use the green lightbulb or text selection in the Chrome/Edge extension, Grammarly Editor, or desktop apps. Plans and monthly prompt limits follow Grammarly Support: Introducing generative AI assistance, Browser extension user guide, How many generative AI prompts do I have?, Premium to Pro plan update.

The searchable job is Grammarly AI writing assistant: create account, enable generative AI, browser extension and Editor, Free/Premium/Pro prompt limits. Trust official Help—not third-party “unlimited rewrite” tables. Safari/Firefox extensions and Word add-ins are not on the supported generative AI product list (I can't use generative AI).

Grammarly generative AI vs ChatGPT billing

Create a Grammarly account and confirm your plan

1. 01
   Sign up on the site

   Go to grammarly.com and create an account with email or supported social login; complete verification as prompted.

2. 02
   Install a supported app

   On-demand generative AI appears in Chrome/Edge extensions, Grammarly Editor, Grammarly for Windows/Mac, and listed mobile apps (Supported product offerings). Not Grammarly for Microsoft Office or Safari/Firefox extensions per the same list.

3. 03
   Check your plan

   Free accounts get monthly refills of generative AI prompts; when exhausted, UI shows days until the next refill (How many prompts). Help states Premium: 1000 prompts/month; Grammarly Pro (web): 2000 prompts/month plus team seats (Updating Premium to Pro). Pricing at grammarly.com/plans.

4. 04
   Education / Business members

   Admins can disable generative AI for the org—check Features or ask your admin (Business section).

Turn on Generative AI in account and extension

1. 01
   Feature customization

   After sign-in, open Feature customization and switch generative AI options on (Step 2). If toggles are grayed out, contact Grammarly Support per that article.

2. 02
   Extension dropdown

   Chrome/Edge: toolbar Grammarly icon → Generative AI in the dropdown—same intent as Windows/Mac Settings → Customization → Generative AI.

3. 03
   Optional AI Chat

   Extension settings include Activate AI Chat and manage generative AI settings (Managing settings). Mac AI Chat can start docs from a prompt (Introducing generative AI).

4. 04
   Firewall / antivirus

   If the lightbulb never appears, allow Grammarly hosts listed in Step 3 (auth.grammarly.com, data.grammarly.com, etc.).

First generative AI action in Chrome/Edge

1. 01
   Confirm the extension

   Grammarly icon in the toolbar and in the lower-right of text fields (Checking text).

2. 02
   Click the green lightbulb

   Next to the Grammarly icon, type a prompt or pick contextual suggestions (Using generative AI).

3. 03
   Or select text to rewrite

   Highlight text and use the pencil/lightbulb or sidebar; suggestions like “Improve it” count as one prompt (What is a prompt).

4. 04
   Check remaining prompts

   Upper-right count on the lightbulb UI; hover for days until monthly refill. Grammarly for Mac: Help notes a 1000 prompts/day cap with daily reset and no remaining-count UI yet (Mac note).

5. 05
   First practical task

   Rewrite a three-sentence email draft in Gmail, then accept grammar underlines—better than empty chat for judging Premium/Pro.

Generative AI in Grammarly Editor

1. 01
   Open the Editor

   From the extension toolbar or dashboard (Create a new document).

2. 02
   Write with generative AI tab

   Ask for an outline or paragraphs (On-demand generative AI, Editor user guide).

3. 03
   Paragraph rewrites

   Select a paragraph and use sidebar or paragraph-level rewrite flows linked from the same Help hub.

Minimum loop: sign up → enable Generative AI → lightbulb rewrite one email → read prompt count and refill date—four steps to decide if it complements ChatGPT.