AI Detector

Make AI text read
naturally for Smodin.

Q: How accurate is Smodin's AI detector?

Smodin reports probabilities, not certainties, and AI detectors as a class show both missed AI text and false positives on human writing. No Smodin score should be treated as definitive on its own.

Q: Why did Smodin flag my own writing?

Smodin flags low-perplexity, evenly paced writing, and simple or non-native English constructions often read as AI to it. A flag does not mean you used AI — it means your phrasing happened to look predictable to the model.

Smodin is a multi-tool writing platform that bundles a paraphraser, summarizer, and an AI-content detector alongside its other features. Here's how its detection actually works, what its false-positive record looks like, and the honest version of what a humanizer can and can't do about it.

How Smodin works

Smodin's AI detector estimates the likelihood that a passage was generated by a large language model such as ChatGPT, Claude, or Gemini, returning a probability rather than a binary answer. Like most detectors it reads statistical signals — perplexity, how predictable each word is to a model, and burstiness, the variation in sentence complexity. Text that is consistently predictable and evenly paced reads as machine-written, while human writing tends to be less uniform.

False positives

Smodin's score is probabilistic and should not be the sole basis for action against a writer. AI detectors broadly misfire on genuinely human text, especially writing that is formulaic, simple, or produced by non-native and ESL English speakers, whose low perplexity resembles AI output. Treat any single score as a signal, not a verdict.

Where we stand We measure every rewrite against Sapling's AI detector and show you the score, so you can see how natural the output reads. We do not claim to pass Smodin or any specific detector — their models change frequently and no humanizer, including ours, can guarantee passage at every moment. Anyone selling "100% undetectable guaranteed" is making a promise the technology can't keep. What Humanizer does is rewrite the rhythm, word choice, and structure that detectors key on, and let you match your own voice.

What a rewrite actually looks like

Here's the same paragraph before and after Humanizer — the structure, rhythm, and word choice change, not just a few swapped synonyms. The percentage is Sapling's AI-likelihood estimate, shown on every rewrite. It's a signal, not a guarantee against Smodin.

Humanizer — Humanize

AI-generated input

96^% AI

AI has become an integral part of modern content creation. With the advent of large language models, the ability to generate high-quality text has been revolutionized, allowing for unprecedented efficiency in writing workflows.

Humanized — Academic

11^% AI

Recent advances in large language models have genuinely reshaped how people write. What used to take days of drafting can now happen in an afternoon — though how much it helps still depends on the field, and we're all figuring out the limits.

Before/after on a sample paragraph. Scores are Sapling estimates and will vary by text — Humanizer never promises a clean pass on any detector.

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Humanize your text.
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Paste up to 1,500 characters, pick a mode, and get a real rewrite with an AI-detector score. No account, no card.

Or try a sample:

Your text0 / 1,500

Humanized — Casual

Your rewrite will appear here.

Free tool runs Claude Haiku, one pass. Pro (app & web) uses the stronger model with a detector-guided retry loop, longer text, and unlimited rewrites.

Humanize free — then get the app

Try the rewriter right here, no signup. Get the native Mac & iPhone app for unlimited rewrites, longer text, and the stronger model.

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FAQ

Smodin questions, answered.

Is Smodin's AI detector free?

Smodin offers AI detection as part of its writing platform, with free use typically limited by length or volume and fuller access behind its paid tiers. Like any detector, its result is an estimate rather than proof.

How accurate is Smodin's AI detector?

Why did Smodin flag my own writing?