Detection & evals
Sapling AI Content Detector
Sapling AI Content Detector is a free tool developed by former researchers to help users identify whether text is AI-generated.
What is Sapling AI Content Detector?
Sapling AI Content Detector is a free tool developed by former researchers to help users identify whether text is AI-generated.It detects output from major large language models including ChatGPT, GPT-5, Claude, Gemini, DeepSeek, and Qwen, effectively identifying so-called 'AI slop.' The tool provides not only an overall confidence score but also analyzes the AI generation probability for each sentence, allowing for more precise assessment of content origin.
In addition to pasting text directly, Sapling supports uploading PDF and Word documents, as well as checking web pages via URL.Its detection models are continuously updated to adapt to the latest AI model versions, significantly reducing false positives.For users requiring batch processing or automation, Sapling offers an API interface and a Pro dashboard that supports higher character limits and history tracking.
Key features
- Multi-Model CoveDetects content generated by the latest models including GPT-5, Claude 4.5/5.5, Gemini 2.5, Qwen3, DeepSeek-V3, and Kimi.
- Sentence-Level SProvides an overall score while highlighting suspected AI-generated sections and offering individual AI probability scores for each sentence.
- Multi-Format SupSupports direct text input, PDF and Word document uploads (requiring selectable text), and URL checks for web pages (first 2,000 characters for free, more for Pro).
- Multilingual DetAutomatically detects language and supports AI content recognition in 16 languages, including English, Chinese, Spanish, French, German, Japanese, Korean, and Arabic.
- Low False PositiOptimized through internal evaluations to reduce false positives by 60%, better distinguishing human writing from humanized AI text.
- API & AutomationOffers API keys for developer integration, supporting automated detection workflows with detailed usage and technical documentation.
How to use it
- Visit the Sapling AI Content Detector page to start using basic features without registration.
- Paste the text you want to check into the text box; at least 50 words are recommended for better accuracy.
- Alternatively, click the upload button to select a local PDF or Word document for analysis.
- View the overall AI generation probability score and scroll down to see detailed scores and highlights for each sentence.
- To check a webpage, enter the URL for a quick scan, or install the Chrome extension to use the detector on any site.
- For advanced needs, sign up for a free Pro trial to unlock higher character limits and detection history.
Where it fits
- Educational InteTeachers and educators can use this tool to screen student assignments or papers, identifying content potentially written by AI to maintain academic integrity.
- Content ModeratiSEO practitioners and webmasters can use this tool to detect low-quality AI-generated text in user-generated content or outsourced articles, avoiding search engine penalties.
- Resume ScreeningHR departments can use the dedicated resume detector to batch-check candidate submissions for AI generation, ensuring authenticity.
Pricing and free quota
Pricing and any free quota follow the official site.
Who it is for
- Educators
- SEO Specialists
- Content Moderators
- HR Professionals
- Developers
FAQ
How does the Sapling AI detector work?
It uses a Transformer-based machine learning system similar to those used to generate AI content.Instead of generating words, it calculates the probability that each word or token in the input text is AI-generated, visualizing both overall and sentence-level scores.
Are the detection results completely accurate?
No.No current AI content detector, including Sapling's, should be used as the sole determinant of whether text is AI-generated.False positives and negatives can occur, so it should be used alongside human judgment.
Which languages are supported?
It supports English, Spanish, Portuguese, French, German, Italian, Dutch, Japanese, Polish, Chinese, Arabic, Russian, Swedish, Korean, Turkish, and Romanian, with automatic language detection.