QuillBot paraphrases 125 words per pass on its free plan. Not 125 words a day, and not a message count that resets at midnight. It is 125 words per paste, in two modes, and the rest of your paragraph stays exactly where you dropped it.
That is one design for a free tier. Grammarly chose another: every spelling, grammar and tone check is uncapped at $0, and the generative half is rationed at 100 AI prompts a month. Claude publishes no number at all, only “limited usage every 5 hours and every week”. Gemini meters compute and refreshes it every five hours. ChatGPT charges nothing for text chats and marks nearly everything else “Limited”.
Five tools, five definitions of free. Choosing between them is not a feature comparison, because their feature lists have converged. It is a decision about which ceiling you can work inside without noticing it.
This page was published on 18 April 2026 under a title that promised a test and a ranking, and it delivered neither. It has been rewritten on 14 November 2026, with every constraint below read from the vendor’s own pricing or help page on that date, and with the paid platforms it used to profile reduced to the one section where paying is the honest answer.
The meter decides the job, not the feature list
Four kinds of ceiling cover all five free plans, and each fails at a different moment.
| Tool | What the free tier counts | What it withholds |
|---|---|---|
| ChatGPT | Text chats, unlimited subject to abuse guardrails | Model choice, uploads, memory depth, a 27K context with about 12 pages of input |
| Claude | Usage, “limited every 5 hours and every week”, no number given | Opus, Fable, Research; context varies by model, up to 1M |
| Gemini | Compute, refreshed every 5 hours up to a weekly cap | A 32k-token context, and Deep Research when demand is high |
| Grammarly | 100 AI prompts a month; correction is uncapped | Full-sentence rewrite, tone adjustment, plagiarism and AI detection |
| QuillBot | 125 words per paraphrase, 1,200 words per summary | Unlimited modes, custom summaries, documents above 10 MB |
A per-action meter is the easiest to plan around and the most annoying to hit, because it fails mid-sentence. QuillBot’s does exactly that. A per-period meter fails at the end of a month you were not counting, which is Grammarly’s shape. A per-window meter fails in the middle of a working afternoon, when the five-hour window closes and the weekly cap is still ahead of you.
ChatGPT is the outlier, and the outlier is instructive. Its text chats carry no count, and its guardrail is a policy rather than a number: the asterisk on “unlimited” resolves to usage that must be reasonable and comply with OpenAI’s policies. Everything adjacent to chat is rationed. Uploads are limited, deep research is limited, memory is limited, and so is the context window itself.
The free chat is also model-restricted. OpenAI’s feature table grants the Free column GPT-6 Luna and GPT-5 Thinking Mini, and denies it the Astra and Sol tiers along with every legacy model. Unlimited chat is unlimited access to one tier of model, which matters more for drafting than for editing, and the model-by-model numbers sit in our ChatGPT, Claude and DeepSeek comparison.
A 1,800-word draft, finished at zero
Arithmetic is more useful than opinion here, and anyone can redo it. Take a single 1,800-word feature, roughly the length at which a free tier starts to bite, and walk it through the three jobs a draft passes through.
Correction costs nothing. Grammarly meters generation, not proofreading, so a full spelling, grammar and tone pass on 1,800 words spends zero of the 100 prompts. That is the smallest first step available in this entire comparison, and it is free in the sense that matters: no decision, no count, no metered action spent.
Rewriting is where the ceiling appears, because full-sentence rewriting is marked unavailable on Grammarly’s free plan. QuillBot will do the work at 125 words a pass, which for 1,800 words means 14.4 passes, so fifteen pastes in practice. Every paste is a seam, and fifteen seams in one piece is exactly the texture most readers describe as machine-written.
Drafting from scratch is the one job the free chat handles without a counter. ChatGPT’s free input ceiling is quoted as roughly 12 pages of text, which is more than 1,800 words, so volume is not the constraint there. Model choice is. If the passage has to survive a 125-word cut, or the prompt has to do the work of a good brief, the difference between tiers stops being cosmetic, and the prompt cheat sheet is the cheaper place to spend effort than an upgrade.
So the zero-cost path is not one tool. It is Grammarly for correctness, a chat model for whole-document work, and QuillBot for passages short enough to survive the cut. If the 125-word limit is the one that hurts, the cheapest repair in this whole set is QuillBot Premium at $8.33 a month billed annually, against Grammarly Pro at $12 a month and Jasper at $59 a month billed yearly.
What the free tier teaches you to do badly
A meter does more than ration output. It shapes method, and two of these five shape it badly.
Google’s own help page advises starting a new chat when you move to a new topic, because Gemini will not have to re-read a long conversation history before answering. The advice saves quota. It also fragments the document, since each section written in a fresh context cannot see the argument the previous section made, and the reader gets a set of sections instead of a piece.
The context ceilings push the same way. A free Gemini account gets 32k tokens against the 1 million on AI Pro and Ultra, which Google describes as 1,500 pages of text, and a free ChatGPT account gets 27K with about 12 pages of input. Long work gets chunked, chunked drafting produces paragraphs that never refer to each other, and that uniformity is one of the signals examined in our guide to detecting AI-written text, which argues that em dashes are the wrong tell because they are the easiest one to remove. The workflow fix is not a bigger plan. It is rebuilding the structure after the drafting, which is what the AI-drafts-to-blog-posts process does in five stages.
The second effect has nothing to do with quality. ChatGPT’s free plan states that content is used to train the models, with an opt-out available. On a personal essay that is a setting. On a client’s unpublished manuscript it is the most expensive line in this article, and it costs more than every prompt cap combined.
Where the free meter ends and the invoice starts
The real boundary is not “the free plan is too limited”. It is collaboration: a second writer, a brand voice that has to survive across people, or a process that must run without someone pressing go on each step.
Jasper now sells one self-serve plan. Pro is $59 a month billed yearly or $69 billed monthly, and it includes one seat and two brand voices. Copy.ai starts at $29 a month billed monthly, or $24 a month on the $288 annual, then moves to $1,000 a month at Growth for 75 seats and 20,000 workflow credits. Writesonic no longer leads with article writing at all: its page is titled AI Search Visibility, its plans run from $79 to $399 a month billed annually, and articles arrive as an add-on.
Those three are not substitutes for the five free tiers. They are a different purchase, priced per seat and per workflow rather than per output, and the reason cost per thousand words is the wrong unit is set out in the AI content generator comparison. The narrower question, whether Writesonic or Surfer is the better buy for search work, has its own page at the SEO tool showdown.
What no pricing page will tell you
Three of the five free tiers publish no number for their main limit. Claude’s is “limited” every five hours and every week, Gemini’s is “standard limits” defined only relative to the paid tiers that multiply it, and ChatGPT’s is reasonable use. Only Grammarly and QuillBot state a ceiling a reader can plan around, and QuillBot qualifies even that: usage may vary by surface.
None of the five publishes a cost per action, so the table above is arithmetic on published ceilings rather than a measurement of output. That distance is the gap this page cannot close. Nobody has published what one limited message actually costs on Claude’s free plan, which means the honest ranking between Claude and ChatGPT free cannot be finished, only outlined: ChatGPT rations everything except chat, and Claude rations chat itself.
Anthropic’s own page does not quite agree with itself on the details. The Free card lists Projects among the Pro additions, while the feature comparison on the same page gives Free “up to 5” projects. Read either line as the answer and you are reading a page maintained by two teams with two ideas about what free means.
What would close the gap is a week of usage data: five-hour windows, the weekly cap, the number of prompts one 1,800-word piece really consumes. That data sits behind a login no pricing page exposes. Every figure here was read on 14 November 2026 from eight pages, being the OpenAI, Anthropic, Grammarly, Jasper, Copy.ai and Writesonic pricing pages, Google’s Gemini limits help page and QuillBot’s premium page. Limits change without notice, as Google says on its own page and as Anthropic reserves the right to do at its discretion, so the table has a shelf life measured in weeks. The arithmetic in it does not.
Independent technology writer focused on artificial intelligence, emerging technologies, and digital innovation. Covers AI applications in sports, productivity, and online business.
