AI Detector Pro AI text detector

The FAQ states the limits in characters: scans have a limit of 40,000 characters, which is about 6000-7000 words, and document humanizations have a character limit of 3000-6000 characters depending on the type of humanization and the language (aidetector.pro/pages/faq, read 10 November 2026). Each click of Scan counts as one AI scan, so rescanning a document after an edit spends another scan. The free version includes 3 scans, with a limited document size, and the FAQ explains the limit by the cost of running the models on GPUs. No upload format list is published, so the file types field is empty. Registration is required for the free plan; the FAQ states no credit card is required.

Prices below are as displayed in USD on 10 November 2026 on aidetector.pro/pricing. Each paid card shows a list price struck through beside a price with 50% off code MSXOA3, and the pricing FAQ states that a coupon applies to every subsequent month or year.

The API is sold only with the Unlimited plan and billed per use: $0.09 for each unit (1 unit is up to 4000 characters) (each POST to /public/api/v1/reports), with all other endpoints free and requests rate limited (aidetector.pro/developers, read 10 November 2026). The index's API price field converts that unit at 5.5 characters a word to about $0.124 per 1,000 words, and the conversion is stated beside the vendor's own unit on the API pricing ranking.

Retention is stated three ways. The privacy policy, last updated 10 Jul 2023, says of user content: "We store this data in order to provide the core functionality to our users. It is automatically deleted at the beginning of the 4th month after it was entered", and later: "With AI Detector Pro we will store documents you create until you delete them or you delete your account" (aidetector.pro/pages/privacy, read 10 November 2026). The terms of service add in section 34: "We do not keep the contents of reports and documents uploaded indefinitely. Data can only be expected to be maintained for 2 months. After that, we may delete any data at our discretion" (aidetector.pro/pages/terms, read 10 November 2026). The card's retention field takes the dated policy's automatic deletion clause as 90 days and quotes the other two lines beside it.

AI Detector Pro publishes no accuracy percentage and no false positive rate. The FAQ answers "Is AIDP 100% accurate?" with "No. Language models are based on algorithms that have a random component. There is no way to be 100% accurate in this space. In the vast majority of cases, AIDP is accurate, and we are constantly improving and updating our algorithms to maximize accuracy" (aidetector.pro/pages/faq, read 10 November 2026). The site footer repeats the point: "Due to the nature of AI models and the inherent randomness of the algorithms, no tool can be 100% accurate. While we strive to ensure that this tool is as accurate as possible, there will likely be some incorrect identifications and humanizations."

The product's humanizer is described in the vendor's own words. The AI Eraser "helps you humanize your content by finding words and phrases that trigger AI detection tools", and the terms state in section 33 that "automated rewrites are not guaranteed to get any particular score (or pass as human) on any AI detection tool, including our own" (aidetector.pro/pages/terms, read 10 November 2026). No statement says the detector catches paraphrased or humanized text, so that field records the absence and the rewriting feature. The about page frames the product's purpose as protecting students and employees against accusations of cheating and asks: "Don't the people with the least power have the most to lose?" (aidetector.pro/pages/about, read 10 November 2026).