Writing is the task AI does best and the one most people want it for. All three big tools are good at it, so the choice comes down to the kind of writing, the tone you like, and how much of it you do. Here is the honest comparison.
| Tool | Free tier | Main paid plan | Good at for writing | One limitation |
|---|---|---|---|---|
| ChatGPT | $0 | Plus $20 (Go $8 is a cheaper step) | Fast drafts, many formats, images and voice in the same app | Default tone can sound generic unless you steer it |
| Claude | $0 | Pro $20 | Natural prose, long documents, editing your own text without flattening it | Free tier usage can run out on a heavy day; check the vendor page |
| Gemini | $0 | Google AI Pro $19.99 | Writing inside Gmail and Docs, quick replies | Less consistent on longer, more careful pieces |
A worked example: one paragraph, three tools
We gave all three this rough paragraph and the same instruction: "Rewrite this as a short, warm update to a team, under 80 words, keep the two dates." The drafts were all usable. ChatGPT's was the quickest to read and the most generic. Claude's kept more of the writer's own phrasing. Gemini's was the shortest. None was wrong. The difference was flavour, and flavour is worth testing yourself.
Try it
Run the rewrite, then paste it into a free chatbot to compare
Your turn
Change the tone and see what moves
Rewrite this as a short update to my team. Make it [TONE]. Under 80 words. Keep both dates and do not add anything I have not said. "so the launch moved from the 24th to the 1st because legal still hasn't signed off on the terms page, and marketing want another week for the email anyway. nothing anyone did wrong. we'll use the extra week to fix the onboarding bug that keeps coming up in support. thanks for the push on this, it's looking really good"
Hint: Try "warm", then "matter-of-fact", then "like a text to friends". The tone word is where most of the difference between tools shows up, so it is the fairest thing to compare on.
Knowledge check
You write two or three short emails a day with AI help and have never hit a free limit. Which is the sensible choice?