Description
The Leap AI Content Detector is a free tool for checking whether any English text was written by a human or an AI model. You paste an essay, blog post, email or other prose and get a sentence-by-sentence score, so you can see exactly which spans read as AI and which already read as human, rather than relying on a single document-level number. Detection is free with no word limit, no signup and no usage quota.
Read More
The detector compares statistical patterns such as sentence rhythm, vocabulary distribution, burstiness and token perplexity against baselines for human and AI writing, and surfaces the specific AI patterns it detects, like hedging language, em-dash density and syntactic templates. It identifies content from ChatGPT (GPT-3.5 through GPT-5), Claude (Sonnet, Opus, Haiku), Gemini (Pro, Ultra, Flash), Llama, Mistral, DeepSeek, Perplexity and Grok, and is continuously tuned on fresh samples as new models release.
Leap is transparent about limitations: no detector is 100% accurate, short inputs under 50 words and non-native English writing are at elevated risk of false positives, and it recommends treating any score as one input rather than a verdict and comparing across multiple detectors. It is aimed at editors, publishers, educators, students and writers who want an explainable, per-sentence view they can act on.
- CategoryAI Content Detectors
- Pricing ModelFree
- DeploymentCloud
- PlatformsWeb
Leap AI Content Detector's Core Features
Free AI content detection with no word limit or signup
Sentence-level scoring
Model fingerprinting across major LLM families
Explanation of the AI patterns detected
Detection of ChatGPT, Claude, Gemini, Llama and more
Continuously tuned on new model releases
Transparent about accuracy limitations
Works on essays, blog posts, emails and other prose
How to use Leap AI Content Detector?
Paste your text: Add any English prose of at least 50 words to the detector.
Run the check: Scan the text for AI-generated content, free with no signup.
Review sentence scores: See which sentences read as AI and which read as human.
Act on the signals: Use the per-sentence view and pattern explanations, and compare with other detectors before drawing conclusions.
Leap AI Content Detector's Use Cases
- Editorial review
- Academic checks
- Self-checking drafts
- Targeted editing
