AI Detector

Paste a passage and get a human probability score plus sentence-level flags from Winston AI. 300 to 150,000 characters, 3 credits per 1,000.

AI Detector

Paste a passage and get a human probability score plus sentence-level flags from Winston AI. 300 to 150,000 characters, 3 credits per 1,000.

Paste a passage and get a human probability score plus sentence-level flags, powered by Winston AI. Scans run on English text from 300 to 150,000 characters and cost 3 credits per 1,000 characters.

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One scan, two levels of detail

Human probability score

Each scan returns a 0 to 100 human score for the whole passage. Higher means more likely written by a person.

Sentence-level flags

Every sentence gets its own score on the same scale, so you see exactly which lines read as machine written.

Long documents in one run

Scans accept 300 to 150,000 characters, so essays, articles and reports fit whole instead of in chunks.

Priced by text size

3 credits per 1,000 characters with a 3 credit minimum. A 2,000 character scan costs 6 credits, shown before it runs.

Covers major generators

Winston's model is tuned for mainstream generators like ChatGPT, Claude, Gemini and Llama.

Results inside the chat

The score card arrives as a normal chat result: review it, rerun a shorter excerpt, or share the conversation.

From pasted text to a score in four steps

Type /detect and paste the text

The passage goes right after the command. Anything from 300 to 150,000 characters works in one scan.

Check length and price upfront

Cost is 3 credits per 1,000 characters. Under 600 characters the score is less reliable, so prefer whole paragraphs.

Read the human score

The result card shows a 0 to 100 human probability for the whole passage. Low scores point to machine writing.

Check the flagged sentences

Each sentence is scored on the same scale, so you can quote, rewrite or rescan the parts that triggered the flags.

Who uses the AI detector

Educators

Screen essays and assignments for machine-written passages before grading.

Editors and publishers

Check freelance submissions and guest posts for undisclosed AI drafts.

Marketing teams

Verify that campaign copy reads human before it ships.

Students

Score your own draft before submission to see what a detector flags.

Content and SEO teams

Spot-check outsourced articles that are supposed to be human written.

Copy a prompt, run it as /detect

When a different tool fits better

No detector is proof

Detection is probabilistic. Human writing can score as AI and AI text can pass as human, especially short or edited passages. Use the score as one signal among others.

English text only

Scans run on English input. Passages in other languages need a different check.

One-off free use

There is no free plan for detection. Scans start on Pro at $20 per month. For a single check, a free detector is enough.

AI detector questions

Is the AI detector free to use?

Not fully. /detect runs on credits at 3 credits per 1,000 characters of text. Pro is $20 per month and includes monthly credits.

How accurate is the AI detector?

The result is a human probability, not a verdict. Scores on short, heavily edited or mixed human and AI passages are less reliable, and every detector can produce false positives.

What text length works best?

Between 300 and 150,000 characters per scan. Under 600 characters the score is less reliable, so paste whole paragraphs rather than single sentences.

Does it catch text from any AI model?

The detector is tuned for mainstream generators like ChatGPT, Claude, Gemini and Llama. Heavily rewritten or human-edited AI text is harder to flag.

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