# GPTZero review (2026): is it worth it? > AI-writing detector with plagiarism, writing replay and an API Checked Nov 13, 2026 ยท graded Nov 13, 2026 by ToolGPA. GPTZero checks whether text was written by AI and says it covers output from ChatGPT, Claude, Gemini and Llama. It also offers a plagiarism checker, writing feedback, a hallucination detector and a Chrome extension that records a Google Docs writing replay. It is aimed at educators, students and teams, with a free plan, paid individual plans, team seats and an API. - **Category:** Writing Tools - **Made by:** GPTZero - **Website:** https://gptzero.me - **Runs on:** Web, Browser extension - **Who should skip it:** Tight if you check a lot: the free plan stops at 10,000 words a month. - **Facts last checked:** Nov 13, 2026 ## Pricing GPTZero's current pricing could not be confirmed from its own site. ## Key features - **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. ## Good for - Teachers checking student work for AI use - Students who want a writing replay as proof of authorship - Teams that scan many documents and want shared seats ## Worth knowing - 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. ## ToolGPA grades **GPA: 2.4 out of 4**, graded Nov 13, 2026. GPTZero checks text for AI writing and adds plagiarism checks, a writing replay in Google Docs and an API. A free plan stops at 10,000 words a month, paid prices vary by region and couldn't be read as one dollar figure, and the API is priced apart. - **Value for money: C.** No single US dollar list price could be read, and prices vary by region. Left in the middle of the category. - **Free plan and trial: C.** A free plan up to 10,000 words a month, which a regular user will hit. - **Features: B.** AI detection, writing replay, plagiarism, grammar feedback, a hallucination checker and an API. Nothing in the listing shows a gap in the core job. - **Ease of use: C.** No store rating on record. You make an account and connect it to Docs or a class system. - **Platforms and integrations: B.** Web and a Chrome extension, with Google Docs, Canvas, Google Classroom, Gmail and an API. These are ToolGPA's own grades. Graded from this listing, whose facts were read from GPTZero's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. ## Where it stands among writing tools - GPTZero's GPA of 2.4 is higher than 59 of the 136 other writing tools we grade, and level with 16. - It stands best on features (B, above 94 of 136) and worst on ease of use (C, above 7). The category's chart of price against score: https://toolgpa.com/charts/writing ## Keep it, or make your own? **Keep it.** Nothing GPTZero does is plain enough to make in a weekend. The 4 things listed below take a company. - You could not: Grammar checking as you type, wherever you type. - You could not: It plugs into other products, Google Docs, Canvas and Google Classroom among them, and has an API. - You could not: AI features, unless you pay a model provider for each request yourself. - You could not: The depth: we grade its features B, which means it covers the whole job. A judgement by ToolGPA from this listing, by rules that are the same for every tool. Nothing was built to test it. ## Works with Google Docs, Canvas, Google Classroom, Gmail, Chrome **Tags:** AI features, Grammar & style, Public API ## Alternatives - [Originality.ai](https://toolgpa.com/tools/originality-ai): AI-content and plagiarism checker with a Chrome extension and API. [Compare](https://toolgpa.com/compare/gptzero-vs-originality-ai) - [Winston AI](https://toolgpa.com/tools/winston-ai): AI text and image detector with a plagiarism checker. [Compare](https://toolgpa.com/compare/gptzero-vs-winston-ai) - [Pangram](https://toolgpa.com/tools/pangram): Detects AI-written text and images, with a free daily allowance. [Compare](https://toolgpa.com/compare/gptzero-vs-pangram) - [Grammarly](https://toolgpa.com/tools/grammarly): Writing assistant for grammar, tone and rewrites in any app. [Compare](https://toolgpa.com/compare/gptzero-vs-grammarly) ## Sources The prices, plans, platforms and features above were read from these pages on Nov 13, 2026: - https://gptzero.me/ - https://gptzero.me/pricing Page: https://toolgpa.com/tools/gptzero Listed by ToolGPA (toolgpa.com).