Prices read on gptinf.com on October 7, 2026
GPTinf humanizer review with pricing, word caps and refund terms
GPTinf charges $9.99 to $59.99 a month, or half that billed yearly, for 5,000 words up to an uncapped plan. Refunds close 3 days after you pay. Here is what each plan costs per word and when it beats a dedicated humanizer.
Written by Undetected.ai, a competing humanizer ยท every figure read on the vendor's own pages
The short answer
GPTinf sells three plans. Lite is $9.99 a month for 5,000 humanizer words, Pro is $24.99 for 25,000, and Unlimited is $59.99 with no word cap stated. Billed yearly, each costs half: $4.99, $12.49 and $29.99 a month, about $60, $150 and $360 paid up front. Every plan adds a paraphraser, grammar, plagiarism and AI detector checks. The free box shows only the beginning of a rewrite. Refunds cover the last payment if you ask within 3 days, and the terms, last updated in February 2023, put disputes in Ukrainian courts. For light users GPTinf is cheap; between 25,000 and 100,000 words a month a dedicated humanizer costs less per word.
Read on October 7, 2026 in a desktop browser on gptinf.com, with both the Monthly and Yearly tabs. A banner on the pricing page announced the "final days of the autumn season sale" ending that day, so recheck the yearly prices before you pay. Yearly totals are our arithmetic.
What GPTinf charges
GPTinf pricing on all three plans, monthly and yearly
Same three cards, two billing tabs. The yearly tab halves every price.
Lite
Monthly
$9.99
Yearly, per month
$4.99
- 5,000 humanizer words a month
- Files up to 5,000 words
- About $59.88 a year paid up front
- Per 1,000 words at full use: $2.00 monthly, $1.00 yearly
Pro
Most popularMonthly
$24.99
Yearly, per month
$12.49
- 25,000 humanizer words a month
- Files up to 25,000 words
- About $149.88 a year paid up front
- Per 1,000 words at full use: $1.00 monthly, $0.50 yearly
Unlimited
Monthly
$59.99
Yearly, per month
$29.99
- No cap stated humanizer words a month
- Full files, no word cap
- About $359.88 a year paid up front
- Per 1,000 words at full use: Falls the more you use
The ladder is simple and the yearly discount is exactly 50% on every card: $9.99 to $4.99, $24.99 to $12.49, $59.99 to $29.99. Lite and Pro also carry paraphraser words (2,500 and 12,500 a month), and all three include unlimited plagiarism, grammar and AI detector checks, unlimited re-humanizing and every rewrite mode. Pro adds priority email support; Unlimited adds what GPTinf calls top-tier support and early access to new features.
Two details are easy to miss. First, the yearly tab shows a monthly figure, but you pay the year at once, so Pro on the yearly tab is about $149.88 on day one, not $12.49. Second, the pricing FAQ says "all plans are month-to-month", which does not square with a plan billed yearly. Read the checkout screen for the actual billing period before you enter a card. If you are working out which humanizers cost least per word across the whole field, our cheapest AI humanizer ranking puts GPTinf next to the rest.
Price per word
What 1,000 humanized words cost on each plan
Full use of each allowance. Unlimited is left out because it publishes no word figure to divide by.
Per word, GPTinf's small plans are expensive and its yearly Pro plan is fair. Lite billed monthly works out to $2.00 per 1,000 words, four times Pro on the yearly tab. Our Starter plan sits at $0.24 per 1,000 words billed yearly, about half of GPTinf Pro, but only if you actually use most of the 100,000 words. If you humanize one 1,500-word essay a week, you need about 6,000 words a month, and GPTinf Pro at $12.49 is the cheaper bill.
So the right comparison is your monthly volume, not the price per word on its own. The grid below does that sum for four typical writers.
Pick by volume
Which plan is cheapest for the words you actually rewrite
Billed yearly, cheapest option in each band. Where GPTinf wins, we say so.
Up to 5,000 words
A few emails, a cover letter, one short paper a month
Cheapest pick
GPTinf Lite
$4.99 a month
5,000 to 25,000 words
A weekly essay or two blog posts a week
Cheapest pick
GPTinf Pro
$12.49 a month
25,000 to 100,000 words
A writer or small team rewriting drafts most days
Cheapest pick
Undetected.ai Starter
$24 a month, vs $29.99 for GPTinf Unlimited
Above 100,000 words
Agencies and content teams at volume
Cheapest pick
GPTinf Unlimited
$29.99 a month, no word cap stated
Three of the four bands go to GPTinf, and that is the honest read. Our case is the middle of the market: someone rewriting between 25,000 and 100,000 words a month, who would otherwise jump from GPTinf Pro straight to the $29.99 Unlimited tier. In that band our Starter plan costs less and comes with a stated 1,500-word limit per run, so a full essay section or blog post goes in at once. Every rewrite also shows our AI-pattern score before and after, with the patterns it found named, so you can see what changed rather than trusting a single number.
If you write for clients, the AI humanizer for content teams page covers how the higher plans handle shared volume.
Read before you pay
What the GPTinf pricing page promises and what its terms say
Quotes from gptinf.com/pricing on the left, from the Terms of Service on the right.
Pricing page
- Ultra Humanization "guarantees bypassing all AI detectors, without exception."
- "All plans are month-to-month. Cancel or switch tiers in two clicks."
- "We'll keep your remaining word balance available until period-end."
- "ChatGPT's #1 pick for human-like writing."
Terms of Service
- The services are provided "as-is and as-available", with all warranties disclaimed.
- Refund of the last payment only if requested "within 3 days from the date of payment".
- Cancellation "will take effect at the end of the current paid term."
- Ukrainian law, with the courts of Ukraine holding exclusive jurisdiction. Last updated February 21, 2023.
The gap that matters is between the guarantee and the refund window. The FAQ promises a pass on every detector without exception, while the terms disclaim any warranty and give you 3 days from payment to ask for money back. A guarantee you can only act on for 72 hours is worth little on a yearly plan. No humanizer can honestly promise a result on every checker, because detectors are retrained, disagree with each other and score the same text differently from week to week. Treat any score, ours included, as one reading.
The terms themselves deserve a look. They were last updated on February 21, 2023, before the current plans, the file humanizer and the Unlimited tier existed, and they name a sole proprietor registered in Lviv as the operator. A US buyer who wants to dispute a charge would, under section 19, be doing it under Ukrainian law. GPTinf's FAQ says payments run through Paddle, a payment provider, so the charge may appear on your statement under that name. None of this makes GPTinf a bad product; it does mean the 3-day window is the protection you actually have.
Side by side
GPTinf compared with Undetected.ai on the same columns
Entry plans first, then heavy use. GPTinf wins several rows and the table marks them.
| What you compare | GPTinf | Undetected.ai |
|---|---|---|
| Entry price | $4.99 a month billed yearly, $9.99 monthly (GPTinf wins) | $24 a month billed yearly, $49 monthly |
| Words at that price | 5,000 humanizer words a month | 100,000 words a month |
| Cost per 1,000 words, entry plan | $1.00 yearly, $2.00 monthly | $0.24 yearly, $0.49 monthly |
| Heavy use | Unlimited plan, no word cap stated, $29.99 a month yearly (GPTinf wins above our allowance) | Scale, 1,000,000 words a month |
| Text per run | Box limit not printed; files up to 5,000 or 25,000 words | 1,500 words per run, stated |
| Other tools in the plan | Paraphraser, grammar, plagiarism and detector checks (GPTinf wins) | Humanizer only |
| Refund window | 3 days from payment, last payment only | See our terms |
| Terms and disputes | Dated February 21, 2023; Ukrainian law and courts | Our current terms |
GPTinf is the better buy if you want a cheap all-in-one writing kit, or if you rewrite more than 100,000 words a month and want no cap. It is also cheaper at the bottom of the market, where most students sit. We are the better buy for a steady mid-volume writer who wants a stated per-run limit, a clear allowance and a before-and-after score on every rewrite. Our Starter plan is $49 monthly or $24 a month billed yearly for 100,000 words; Pro is $99 ($49 yearly) for 300,000 words, and Scale is $199 ($99 yearly) for 1,000,000. Every plan is on the pricing page.
Honest verdict
Who should buy GPTinf and who should look elsewhere
Buy GPTinf
Light users who want a toolkit
Under 25,000 words a month, with a paraphraser, grammar and plagiarism checks in the same plan. Start on monthly Lite, judge the output within 3 days, then switch to yearly.
Buy GPTinf Unlimited
Volume above 100,000 words
At $29.99 a month billed yearly with no word cap stated, it is cheaper than any capped plan once you pass that line. Pay monthly first; the yearly bill is about $360 with a 3-day refund window.
Try Undetected.ai
Steady writers in the middle
25,000 to 100,000 words a month, 1,500 words per run, and a score that shows what each rewrite changed. Run a 300-word passage of your own before you pay anything.
Questions people ask
GPTinf questions answered from its own pages
How much does GPTinf cost?
GPTinf costs $9.99, $24.99 or $59.99 a month on its Lite, Pro and Unlimited plans when billed monthly, or $4.99, $12.49 and $29.99 a month when billed yearly, which is about $60, $150 and $360 up front. Lite includes 5,000 humanizer words a month, Pro 25,000, and Unlimited states no word cap.
Is GPTinf free?
Partly. You can paste text and humanize it without signing up, but GPTinf's own FAQ says you only see the beginning of the humanized result, and "a plan unlocks the full output". To copy a whole rewritten essay you need a paid plan, which starts at $9.99 a month or $4.99 a month billed yearly.
Is GPTinf legit?
Yes, it is a real paid service with published prices, terms and a support address, support@gptinf.com. The terms name a sole proprietor registered in Lviv, Ukraine, were last updated on February 21, 2023, and put disputes under Ukrainian law and courts. Payments go through Paddle, a payment provider, according to GPTinf's FAQ.
Can you get a refund from GPTinf?
Only quickly. Section 6 of GPTinf's terms offers a refund of the last payment if you ask within 3 days of paying, by email or through the site, with a decision within 5 business days and the money back within 7 more. After day 3 the terms offer no refund, which matters most on a yearly plan paid up front.
How do I cancel my GPTinf subscription?
Log in and cancel from your account, or email support@gptinf.com. The terms say the cancellation takes effect at the end of the current paid term, and the pricing FAQ says your remaining word balance stays available until then. Cancelling stops the next renewal; it does not refund the current period unless you are inside the 3-day window.
Does GPTinf really guarantee a detector pass?
Its pricing FAQ says Ultra Humanization "guarantees bypassing all AI detectors, without exception", but its terms provide the service as-is and disclaim all warranties, and the refund window is 3 days. No humanizer can promise a result on every checker, since detectors change and disagree. Test the output on the checker that matters to you before relying on it.
Is GPTinf cheaper than Undetected.ai?
At low volume, yes. GPTinf Lite is $4.99 a month billed yearly for 5,000 words and Pro is $12.49 for 25,000, both below our Starter at $24 a month billed yearly. Per word, our Starter is cheaper: $0.24 per 1,000 words against $0.50 on GPTinf Pro. Above 100,000 words a month, GPTinf Unlimited is the better buy.
What is the best GPTinf alternative?
That depends on your monthly volume. Under 25,000 words, GPTinf itself is hard to beat on price. Between 25,000 and 100,000 words, our Starter costs less than GPTinf Unlimited and takes 1,500 words per run with an AI-pattern score before and after. For a broader suite with a detector and paraphraser, QuillBot Premium is another option.
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Essay humanizer
Rewrite a full essay section of up to 1,500 words in one run.
See the whole rewrite before you pay for a year
Run a passage of your own and see our AI-pattern score before and after. Plans start at $24 a month billed yearly for 100,000 words, with 1,500 words per run.