AI Content Detector is a free tool launched by the enterprise writing platform Writer. By entering text, you can estimate the possibility that it was generated by AI. It is often used for content review and originality screening.

AI Content Detector

Core parameters and statistics

AI Content Detector is a lightweight detection tool that is free and open to the public on the enterprise writing platform Writer. It answers a single question: How likely is it that this text was written by an AI. It is not a complete content review system, but a "quick preliminary screening" entrance embedded in the content production process, giving editors, teachers, and reviewers a reference signal.

Projects	Public Information
Official Positioning	AI Content Detection Tool
Producer	Writer
Product form	Web online detection
Core Competencies	Estimating the probability that text is generated by AI
Input method	Paste text / Enter URL
Target users	Editing, reviewing, and educating SEO practitioners
Support Platform	Web
Place of Belonging	United States
Billing form	Free

Product Boundary: The test results are probabilistic judgments, not conclusive conclusions. The field of AI detection as a whole has inherent limitations of misjudgment (judging things written by humans as AI, and judging things written by AI as written by humans). This determines that it can only be used for preliminary screening and cannot be used as a basis for judgment.

Capability source: Writer itself is engaged in generative writing and has accumulated AI text features. The detection tool is a free extension of its capabilities and is used for brand exposure and traffic drainage.

User and market recognition

Gradually build user awareness in the field, and product capabilities are used by content creators and teams to improve work efficiency. Some industry users have incorporated it into their daily workflow. It is recommended to refer to the latest official disclosures for specific user scale and industry adoption rate data.

Cost advantage

• C-side/Individual: Usually a free version is provided to experience the core functions, and high-frequency use requires a paid package subscription.
• API/Developer: Billed by call volume, suitable for development teams that can be flexibly integrated into their own systems.
• Enterprise/Privatization: Contact the business owner to obtain customized quotation and deployment plan. The specific price is subject to the official real-time pricing page.

Main functions

• AI Generated Probability Detection: Gives an estimate of the likelihood that the input text was generated by AI.
• Paste and test: Just paste the text to get the results, and the operation threshold is extremely low.
• FREE AND OPEN: No fees or complicated registration process required.
• Lightweight integration scenario: can be used as a pre-screening step in the content review process.

Hidden linkage: As a free entrance to the Writer ecosystem, its value is not only in the detection itself, but also in guiding users to Writer's more complete enterprise writing and content management capabilities - the free tool is the "funnel mouth", which is why it has been free for a long time.

Model and version evolution

Continuous iterative updates, the latest version introduces performance optimization and new features. Historical version information can be viewed on the official release page. There is no complete public version evolution timeline yet. It is recommended to pay attention to the official announcement to understand the rhythm of feature updates.

Technical advantages

Mechanism: Based on the recognition of statistical characteristics of AI-generated text, a probability assessment is given for the input content.

Effect: Compared with manual sentence-by-sentence judgment, the tool can provide a quick quantitative reference and improve the efficiency of preliminary screening.

Limitations: It should be clear that AI detection cannot achieve deterministic judgment, and there are false positives and false negatives; feature changes after model upgrade will further weaken detection stability. Therefore, its advantage is "efficiency" rather than "authority".

How to use

1. Open Writer’s AI Content Detector page.
2. Paste the text to be detected (or enter the URL as prompted on the page).
3. View the AI ​​generation probability results after submission.
4. Combine the context and human judgment to decide on subsequent processing.

The entrance is purely Web, free and does not require complicated registration.

Product Pricing

The pricing model is subject to the official real-time page. Usually a freemium or subscription system is used, and basic functions can be used for free. Advanced functions or high-frequency use require paid subscriptions, and users are advised to evaluate the optimal solution based on actual usage.

Application scenarios

• Preliminary screening of content review: Editors and platform reviewers quickly determine whether submissions are suspected of being generated by AI.
• Education scenario reference: The teacher makes a preliminary judgment on the assignment text (requires manual cooperation).
• SEO & Content Operations: Evaluate the generated attributes of outsourced or acquired content.
• Personal Self-Check: Authors check the risk of their content being misjudged as AI.

Applicable people

• Editing and Content Review: Need to quickly screen large amounts of text.
• Educator: Make reference judgments on students’ homework.
• Content Operations/SEO: Evaluate the generation properties of bulk content.

Unsuitable Boundary: In scenarios where test results need to be used as the basis for hard decisions such as punishment and academic misconduct, such tools must not be relied upon alone; for scenarios that require extremely high accuracy or require stable detection in multiple languages, more professional solutions need to be evaluated.

Summary and Outlook

AI Content Detector provides content practitioners with a low-threshold AI text preliminary screening tool in a free, ready-to-test manner. Its core value is efficiency, and its core limitation is accuracy - the misjudgment problem of AI detection itself determines that it can only be used as a reference and cannot make a decision.

Implementation suggestions: Put it in the "pre-signal" position of the content review process, and use it in combination with manual judgment and other indicators; any decision involving penalties or qualifications should have manual review and multiple evidence to avoid accidental injury due to a single test result.

Related tools: originality-ai, gptzero

Version evolution of AI Content Detector

As an online tool, the judgment model is updated later and does not have a traditional discrete version number.

Main line context

• Tool launch period: Writer launches a free AI detection tool to provide basic probability determination.
• Continuous Maintenance Period: Adjust the judgment as the AI ​​generation model evolves to cope with changing text features.

The exact version date has not been officially disclosed, and the text is marked with the online version at the time of collection. It is a common trait in the field that the accuracy of AI detection fluctuates as the generative model is upgraded.

Version Info

• AI Content Detector (online version) ：The online detection tool is continuously maintained, and the judgment model is updated later; the official independent version number has not been disclosed, and the online version at the time of collection is marked here. There is no official precise date yet. （~2026-06）
• AI Content Detector is online ：Writer launches a free AI content detection tool to provide basic AI generation probability determination; there is no official precise date yet. （~2023）