Writing with AI
ProWritingAid vs ChatGPT for Editing Your Book
Romance novelist writing cozy, small-town love stories from a bookshop café in Asheville.
ProWritingAid and ChatGPT do different jobs on a manuscript. ProWritingAid is an editor that checks the text you wrote: grammar, style reports, and paid whole-book analyses that report on plot, characters and setting. ChatGPT is a general assistant you talk to: it will explain, critique or rewrite whatever you paste in, within the limits of what fits in one conversation.
So use ProWritingAid when you want repeatable checks on every sentence and a report on the full book. Use ChatGPT when you want to ask questions about a scene and argue with the answers. As listed on 28 October 2026, ProWritingAid Premium is $10 a month billed yearly, and ChatGPT Plus is $20 a month.
StoryWith AI is our own product, so weigh what we say about it accordingly.
Key takeaways
- ProWritingAid checks prose you wrote. Its pricing page lists "25+ writing analysis reports" on Premium, and its help centre says the AI behind most reports "only analyzes your documents to give you suggestions," and names Sparks and Rephrase as the features that use generative AI.
- ChatGPT is conversational. It gives feedback and rewrites on request, and how much of your book it can hold at once depends on the plan, from about 12 pages of input on Free to about 680 on Pro's reasoning model, by OpenAI's own estimate.
- Whole-book reads cost extra on ProWritingAid. Manuscript Analysis and the Virtual Beta Reader use Story Credits, from $17.50 to $50 per run depending on plan and pack size, on manuscripts of up to 300,000 words.
- Training settings differ. ProWritingAid says it "never uses your work or your writing to train our AI models." OpenAI says that on Free, Plus and Pro "we may use your content to train our models," unless you switch the setting off.
- Use them in sequence: structure first, ChatGPT for scene questions, ProWritingAid's checks last.
What is the difference between ProWritingAid and ChatGPT?
ProWritingAid works on your document: it highlights issues and produces reports, and its story analyses come back in fixed sections. ChatGPT works in a conversation: what you get depends on what you ask, the answers vary between runs, and it rewrites text whenever you request it.
That difference decides most of the comparison below. ProWritingAid is built to check; ChatGPT is built to respond.
How much do ProWritingAid and ChatGPT cost?
ProWritingAid plans
| Plan | Monthly | Yearly | Lifetime |
|---|---|---|---|
| Free | $0 | $0 | n/a |
| Premium | $30 a month | $120 a year ($10 a month) | $399 once |
| Premium Pro | $36 a month | $144 a year ($12 a month) | $699 once |
| Story Credits pack | Free users | Premium | Premium Pro |
|---|---|---|---|
| 1 credit | $50 | $35 | $25 |
| 3 credits | $145 | $100 | $70 |
| 10 credits | $450 | $300 | $175 |
Prices as listed on ProWritingAid's pricing page and Credits for Story Editing page on 28 October 2026, in US dollars. Neither page shows a date.
Free accounts get suggestions on 500 words at a time; Premium and Premium Pro check "documents of any length." Monthly plans are not refundable, and yearly and lifetime plans can be refunded if you ask within three days. Our guide to whether ProWritingAid is worth it runs the break-even maths on monthly, yearly and lifetime.
ChatGPT plans
| Plan | Price | What the pricing page lists |
|---|---|---|
| Free | $0 | "Limited messages with uploads", "Limited memory and context" |
| Go | $8 a month | "More messages with tools", "More uploads", "Longer memory"; "This plan may include ads." |
| Plus | $20 a month | "Advanced reasoning models with GPT-6", "Projects, scheduled tasks, and custom GPTs" |
| Pro | From $100 a month ($100, $200 or $500 tiers) | "Your choice of 3 usage tiers", "Maximum memory and context" |
| Business | $20 per user a month billed annually, $25 billed monthly | Team workspace; see training below |
Prices as listed on ChatGPT Learn, "Pricing" on 28 October 2026, OpenAI's page that lists amounts in US dollars. Feature quotes from ChatGPT, "Plans and Pricing", read again on 30 October 2026; that page did not show amounts when we fetched it. OpenAI's Go announcement (16 January 2026) says Go pricing is localized in some markets.
A year on each
A hypothetical comparison at listed prices: ProWritingAid Premium is $120 a year, plus $35 each time you run Manuscript Analysis. ChatGPT Plus is $240 a year ($20 x 12), and Go is $96. Premium plus one Manuscript Analysis is $155, less than a year of ChatGPT Plus.
What does ProWritingAid actually do to a manuscript?
It reads, flags and reports. The pricing page lists, on Premium, "advanced style improvements," a custom style guide, "25+ writing analysis reports," a custom dictionary and comparison against 90 fiction authors. You accept or reject each suggestion.
Its AI is split in two. The help centre article "Does ProWritingAid use AI?" (last updated 12 July 2026, read on 28 October 2026) says "We only use generative AI for the following writing tools and features:" and names Sparks and Rephrase. It lists its reports, including Chapter Critique and Manuscript Analysis, as assistive: "The AI we use for most reports and features only analyzes your documents to give you suggestions."
The story-level tools, as ProWritingAid's help centre (last updated 3 September 2026) describes them:
| Tool | Length | Plan | Output |
|---|---|---|---|
| Chapter Critique | Chapters up to 6,000 words | "Included in all paid plans"; 1 a day on Premium, 30 on Premium Pro | Ten elements, including Overview, Core Strength, Chapter Outline and Dialogue |
| Manuscript Analysis | Up to 300,000 words, 6,000 recommended minimum | "Not included. Available as an add-on." | Five sections: About My Story, Narrative Themes, Plot & Structure, Characters, Setting |
| Virtual Beta Reader | 6,000 to 300,000 words | Add-on, same credits | Four sections: General impressions, Reading experience, Reading insights, Marketing ideas |
Source: ProWritingAid Help Center, "Chapter Critique vs Manuscript Analysis vs Virtual Beta Reader" (last updated 3 September 2026) and ProWritingAid, "Credits for Story Editing", read on 28 October 2026.
Its Manuscript Analysis feature page (no date shown, read on 28 October 2026) states the limit: "Manuscript Analysis is not meant to replace a human developmental editor or beta reader." Our ProWritingAid Manuscript Analysis review covers what it finds and what a rescan costs.
What does ChatGPT actually do to a manuscript?
It answers what you ask. Paste a scene and ask whether the stakes are clear, and it will tell you. Ask it to tighten a paragraph and it will rewrite it. That flexibility is the appeal, and also the risk: a request that only asks for a diagnosis can still come back as new prose.
How much it can see at once is set by the plan. OpenAI's pricing page lists these limits for user input:
| Plan | Instant model | Thinking or reasoning model |
|---|---|---|
| Free | 27K context, "~12 pages of text" | Varies |
| Go | 54K context, ~40 pages | 256K context, ~320 pages (the page lists fewer reasoning models for Go than for Plus) |
| Plus | 54K context, ~40 pages | 256K context, ~320 pages |
| Pro | 128K context, ~250 pages | 400K context, ~680 pages |
Source: ChatGPT, "Plans and Pricing" (no date shown), read on 28 and 30 October 2026. The page calls the input space "an approximation" that "may change dynamically based on features in use and any memory content."
Fitting a book into the window is not the same as reading it well. Our guide to using ChatGPT to edit a novel explains why, and gives prompts that ask for diagnosis rather than rewrites.
Which is better for each editing task?
| Task | ProWritingAid | ChatGPT | Better fit |
|---|---|---|---|
| Grammar, spelling, punctuation | Built in, on every plan | Can correct on request, but may change more than you asked | ProWritingAid |
| Style consistency across a book | Reports and a custom style guide on Premium, run on documents of any length | Only across what is in the current conversation | ProWritingAid |
| Line edits | Style reports flag issues sentence by sentence; Rephrase offers rewordings | Explains why a sentence drags and offers alternatives you can question | Either; ChatGPT for discussion |
| Developmental feedback on a chapter | Chapter Critique on paid plans, up to 6,000 words | Open-ended critique, steered by your questions | Either |
| Whole-manuscript read | Manuscript Analysis, up to 300,000 words per credit | Bounded by the context window on your plan | ProWritingAid |
| Keeping your voice | Suggestions you accept one by one; its help centre names Sparks and Rephrase as the generative features | Rewrites come back in its own wording unless you tell it not to rewrite | ProWritingAid |
| Training settings | "never uses your work or your writing to train our AI models" | Free, Go, Plus, Pro: may train unless you opt out | ProWritingAid by default |
Based on ProWritingAid's pricing page, its help centre article "Does ProWritingAid use AI?", ChatGPT's "Plans and Pricing" page (which lists "Opt-out available" for training on Free, Go, Plus and Pro) and OpenAI's "How your data is used to improve model performance", read on 28 October 2026.
Which is safer for an unpublished manuscript?
ProWritingAid's help centre says it "never uses your work or your writing to train our AI models or algorithms." Its Responsible AI page adds that "Some of our features use Large Language Models (LLMs) developed by leading providers," without saying which.
OpenAI's help article is plain about personal plans: "When you use our services for individuals (Free, Plus, Pro), we may use your content to train our models." To opt out, it says, "turn off Improve the model for everyone under Settings > Data controls in ChatGPT." Business and Enterprise do not train on your inputs by default.
Source: ProWritingAid Help Center, "Does ProWritingAid use AI?" (last updated 12 July 2026), ProWritingAid, "ProWritingAid's Approach to AI" (no date shown) and OpenAI Help Center, "How your data is used to improve model performance" (no calendar date shown), read on 28 October 2026.
If you plan to publish on Amazon, what the tool did to your text also matters. Amazon's KDP content guidelines treat text created by an AI tool as AI-generated "even if you applied substantial edits afterwards" (KDP Help, "Content Guidelines", no date shown, read on 28 October 2026). Our guide to AI-assisted vs AI-generated writing explains the line.
How do you use ProWritingAid and ChatGPT together?
Edit from the largest problem to the smallest, so you never polish sentences you later cut.
- Structure first. Decide whether the book works: what each chapter does, where tension sags, which setups never pay off. ProWritingAid's Manuscript Analysis, a structural tool or a human developmental editor does this job.
- Ask ChatGPT about specific scenes. Paste one scene at a time and ask diagnostic questions. Tell it not to rewrite.
- Revise in your own words. Make the changes yourself in your manuscript.
- Run ProWritingAid's line reports last. Grammar, repetition and style checks catch what your revisions introduced.
- Send it to readers. No software tells you where a real person stopped reading.
When is each one the better fit?
| If you... | Choose |
|---|---|
| Want grammar and style checked on every page, the same way each time | ProWritingAid |
| Want a structured report on a full manuscript without pasting it in pieces | ProWritingAid with Story Credits |
| Want a default promise that your writing is not used for training | ProWritingAid |
| Want to talk through a scene, test alternatives and push back on feedback | ChatGPT |
| Write non-fiction and want help with explanations, structure of an argument or summaries | ChatGPT, checked against your sources |
| Want both line polish and a sounding board | Both, in the order above |
Based on features and prices as listed on each vendor's pages on 28 October 2026.
If neither feels right, our list of ProWritingAid alternatives covers other line and story editors.
Where StoryWith AI fits
StoryWith AI works at step one of the workflow above, the structural pass. It reads the manuscript you wrote and returns one ranked list of what to fix, ordered by severity, with each finding linked to the scene that caused it. It does not rewrite your prose unless you ask for an edit and accept it, and it does not draft your chapters. Our features page lists the analyzers.
The AI beta reader runs simulated reader personas on every plan, including Free. Treat them as a simulated first pass, not evidence of how real readers respond. For real readers, paid plans run reader feedback sessions: you invite your own readers through a private link to excerpts you choose, collect 3 to 20 responses, and see where each one stopped. StoryWith AI does not supply the readers.
As listed on our pricing page on 28 October 2026, Author is $19 a month with 500 AI text actions and 3 reader sessions a month (4 when billed yearly), and Pro is $39 a month with unlimited AI text actions and reader sessions. We do not use your manuscript to train AI models.
It is the wrong tool for grammar, spelling and sentence-level style, which is ProWritingAid's job. It is also the wrong tool if you want an AI to rewrite or draft passages for you.
Frequently Asked Questions (FAQ)
Is ProWritingAid better than ChatGPT for editing a novel?
For grammar, style consistency and repeatable line reports, yes. ProWritingAid checks every sentence of a document of any length on its paid plans and leaves the choices to you. ChatGPT is better for open-ended conversation about a scene, but it sees only what fits in the conversation and may rewrite more than you asked.
Can ChatGPT replace ProWritingAid?
Partly. ChatGPT can correct grammar and suggest line edits on text you paste in, but it does not run the same checks the same way every time, and it has no style guide applied across the whole book. The two can share the work: ChatGPT for discussion, ProWritingAid for the final checks.
Does ProWritingAid use ChatGPT?
ProWritingAid does not say which provider's models power its features. Its Responsible AI page (no date shown, read on 28 October 2026) says some features "use Large Language Models (LLMs) developed by leading providers in the field of generative AI," and its help centre (last updated 12 July 2026) names Sparks and Rephrase as the features that use generative AI.
Will ChatGPT or ProWritingAid train on my manuscript?
ProWritingAid says it never uses your writing to train its AI models. OpenAI says it may use content from Free, Plus and Pro accounts to train its models unless you turn off "Improve the model for everyone" under Settings, Data controls. Business and Enterprise accounts are not used for training by default.
The short answer
Pick ProWritingAid if you want your own sentences checked and a structured report on the full book, with a no-training promise. Pick ChatGPT if you want to discuss scenes and test ideas. If you use both, fix the structure first, talk scenes through with ChatGPT, revise in your own words, and run ProWritingAid last.
