What AI Cannot Do in a Day: The Task I Gave Up On
What AI cannot do in a day is anything you can't check yourself by tonight. I quit a price audit 13 tools in. Here's the line, and how to spot it.
What Grammarlycosts, what you get without paying, and the limits, verified against the vendor’s own pages, plus the one-day projects it shows up in.
Visit Grammarly ↗Has a free tier · paid from $12 (billed annually) or $30 (billed monthly), 2,000 AI prompts/member/month per month · Verified July 2026 · No one-day test yet: these are verified facts, not a review.
Basic grammar, spelling and tone checking, plus 100 AI prompts per month.
| Tier | Price | Period |
|---|---|---|
| Free | $0, 100 AI prompts/month | per month |
| Pro | $12 (billed annually) or $30 (billed monthly), 2,000 AI prompts/member/month | per month |
| Enterprise | on request | per month |
Prices verified July 2026, we re-check every 60 days.
What AI cannot do in a day is anything you can't check yourself by tonight. I quit a price audit 13 tools in. Here's the line, and how to spot it.
I gave five AI writing tools one brief: write my bio. Each broke differently. Where ChatGPT, Jasper, Copy.ai, Grammarly and Sudowrite fall short.
I checked 16 AI tools for a real free tier. Nine are actually free, two are trials in disguise. One question exposes the trick every time.
I ran real writing tasks through Claude and checked ChatGPT, Jasper, Copy.ai, Sudowrite and Grammarly against verified reviews and pricing pages.