GPTZero vs Winston AI (2026): which should you pick?

Pick GPTZero if

• Fits if you grade or review writing and want to check it for AI
• Works for teachers whose classes run on Canvas or Google Classroom

Look elsewhere if

• Tight if you check a lot: the free plan stops at 10,000 words a month
• Skip it if you want one clear price, because paid prices vary by region and by test
• Pricey if you want a team: two-seat minimum, and the API is priced separately
• Watch out: the vendor's own wording suggests a detector is a guide, not proof

Pick Winston AI if

• Fits if you check text and images for AI and want plagiarism too
• Works for small teams that can share credits on Advanced

Look elsewhere if

• Tight if you stay free: 2,000 credits for 14 days, with no plagiarism, OCR or PDF reports
• Not for you if you want to cancel mid-term, because annual plans can't be cancelled during the term
• Watch out: plagiarism checks start on Essential, not the free account
• Watch out: the page advertises a 50% coupon code, so list prices here may not match what you pay

GPTZero

• Paid individual plan prices vary by region and by test; no single US dollar list price could be read.
• The free plan stops at 10,000 words a month.
• The team plan has a two-seat minimum and gives 500,000 words per member each month.
• The API is priced separately from the individual and team plans.

Winston AI

• The free account is a 14-day trial with 2,000 credits, not a plan that renews.
• Plagiarism detection, OCR scanning and PDF reports are not part of the free trial; they start on Essential.
• Annual plans cannot be canceled during the term; monthly plans end at the close of the paid period.
• The pricing page also advertises a 50% coupon code on every paid plan; the prices here are the list prices, without the code.

GPTZero

AI detection

Classifies text from models such as ChatGPT, Claude, Gemini and Llama; an Advanced Scan shows how different sentences score.

Writing replay in Google Docs

The Chrome extension records a replay of a document being written, including copy and pastes and unusual typing patterns.

Plagiarism checker

Checks whether content was copied from outside sources without attribution.

Writing feedback and grammar check

Gives feedback on clarity, tone and wordiness beyond a basic grammar check.

Hallucination detector

A separate checker aimed at hallucinated content in AI-written text, listed beside the AI detector.

Classroom and API integrations

Connects to Canvas and Google Classroom, and offers an API with code samples in 17 languages.

Winston AI

AI text detection

Scores text for AI authorship, naming models such as ChatGPT, Claude and Gemini, with detection in several languages including English, Spanish, German and Portuguese.

Plagiarism checking

Highlights copied passages and shows their sources. Detection of paraphrased content is listed on the paid plans.

AI image and deepfake detection

Scans pictures for AI generation and shows forensic details such as C2PA and Exif data.

Reports and OCR

Paid plans produce shareable PDF or link reports and can scan pictures and handwriting.

Team use

Advanced allows up to 5 members and Elite unlimited members. Enterprise-grade security and shared billing sit on the custom plan.

Browser, Zapier and API

Pages list scanning from the browser, a Zapier connection and API access, which is requested through a form.

GPTZero

Pricing could not be confirmed. See gptzero.me.

Winston AI

• Free$0

  2,000 credits, 14-day trial

  AI text and AI image detection with email and chat support. Plagiarism checking, OCR scanning, PDF reports and team invites are not included.

• Essential$10

  per month, billed annually ($18 billed monthly)

  100,000 credits a month. Adds writing feedback, OCR scanning, shareable PDF reports and plagiarism detection to AI text and image detection.

• Advanced$16

  per month, billed annually ($29 billed monthly)

  200,000 credits a month, HUMN-1+ website certification and up to 5 team members.

• Elite$26

  per month, billed annually ($49 billed monthly)

  500,000 credits a month and unlimited team members.

• EnterpriseCustom

  Custom pricing for organizations, reached through a contact form; the vendor lists school access, API access and reselling as options.

GPTZero

No public discounts listed.

Winston AI

• Annual discount

  Save 45% with annual billing

  The pricing page lists a 45% saving when paying yearly instead of monthly, for example $60 a year for Essential against $18 a month.