Last updated 07-24-2026
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Leap AI
Leap AI combines AI detection and humanization in one workflow. Paste any essay, blog post, or email and get a sentence-level AI probability score in seconds. When passages read too synthetic, one click rewrites them while keeping your meaning and tone intact. Detection is free with no signup; humanization starts with 500 free words.
Most detectors return a single document score. Leap scores each sentence individually with color-coded highlighting so you can see exactly which spans look machine-written. The humanizer targets the rhythm and vocabulary patterns detectors actually measure, not just synonym swaps. It detects output from ChatGPT, Claude, Gemini, Llama, Mistral, and other major models.
Students checking drafts before Turnitin submission, writers polishing AI-assisted copy, marketers producing content at volume, and researchers navigating journal AI policies all use Leap. The bootstrapped team publishes its detection methodology openly and does not train on user-submitted text.
Sentence-level AI scores from 0 to 100 with color-coded highlighting on every passage
One-click humanize rewrites flagged text while preserving facts, citations, and tone
Detects ChatGPT, Claude, Gemini, Llama, Mistral, DeepSeek, and Perplexity output
Before-and-after detection scores let you verify rewrites inside the same tool
Saved history on paid plans so you can re-run and compare earlier drafts
Detection is free with no word limit and no account required for basic use.
Sentence-level scoring shows which passages triggered the detector, not just a single percentage.
Bootstrapped team publishes methodology and does not sell detection data to institutions.
500 free humanization words let you test output quality before subscribing.
Built-in before-and-after verification on every humanization pass.
Humanization beyond 500 words requires a paid monthly plan.
Paid plans meter usage by words per month, so long documents may need section-by-section processing.
No standalone mobile app; the product runs in the browser only.
Detector accuracy drops on very short text under roughly 50 words.
Is Leap AI free to use?
Yes. Leap AI offers free unlimited AI detection with no signup required. Humanization includes 500 free words to start; paid plans unlock higher monthly word allowances starting at $9.99 per month.
What AI models does Leap AI detect?
Leap AI detects text from ChatGPT (GPT-3.5 through GPT-5), Claude, Gemini, Llama, Mistral, DeepSeek, Perplexity, and Grok. The detector is updated as new model versions ship.
Does Leap AI train on my text?
No. Leap AI processes your input to produce detection scores or humanized output, then discards it. The company states it does not retain text for model training and does not sell detection results to universities or publishers.
How does Leap AI's word limit work?
Free accounts get 500 lifetime humanization words. Starter ($9.99/month) includes 10,000 words per month, and Pro ($19/month) includes 20,000 words per month. Detection does not count against any word limit.
Can I cancel a Leap AI subscription anytime?
Yes. Leap AI paid plans are billed monthly and can be canceled from account settings. Paid plans also include a 7-day money-back guarantee if you are not satisfied with the humanization quality.
Will humanized text pass Turnitin or GPTZero?
Leap AI does not guarantee bypass of any detector because accuracy varies by input and detectors update frequently. The tool rewrites rhythm and structure detectors score on, then shows a before-and-after detection score so you can verify results on your own text.