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DetectGPTCheck

Free Claude AI detector

Check Claude writingwith DetectGPT

Paste a finished Claude draft and see which lines still sound generated.

Claude replies are often longer and more careful than a ChatGPT answer, with hedges, balanced sides, and a calm close. DetectGPT still scores the finished prose only. It does not sign into Claude, and it does not read the conversation that produced the draft.

  • 3,000 words
  • No account, free
  • Any LLM draft
  • Analyze URL

Draft

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AI writing report

0%

Waiting on a draft

Flagged passages come back light yellow over 20%, then yellow, orange, or red.

Independent detector. Not affiliated with Turnitin®, and not their software.

Quick reference

At a glance

Best for
Finished Claude drafts
What you paste
The reply, not the chat thread
What you get
A percentage and highlighted lines
Word limit
50 to 3,000 words per run
Account
None. No Claude login
What it is not
An Anthropic watermark or account check

The voice

What stands out in a Claude draft

Claude often writes as if it is trying not to overclaim. You get a concession, then a counterpoint, then a sentence that ties both sides together without picking one. The paragraphs are orderly, the vocabulary stays in a narrow polite band, and the ending restates the task. Those habits are what a writing detector can see. A hidden Claude label is not, because this checker never receives one.

People paste Claude into essays because the tone feels more human than a blunt list. The evenness can still be there after the voice sounds thoughtful. Paste the section you are unsure about, then read the orange and red lines before you treat the percentage as the whole story.

The boundary

DetectGPT does not open your Claude account

There is no connection to Anthropic, no view of projects, and no way to recover the prompt. If the draft was edited in a doc after it left Claude, the checker scores that edited version. Lines you rewrote yourself tend to stay unmarked. Lines you kept tend to carry the score.

That is also why a low result does not prove the text was typed from scratch, and a high result does not prove Claude was the model. The report is a map of the draft in front of you. How DetectGPT scores a draft explains the colors in more detail.

Walkthrough

How to check a Claude draft

  1. 1

    Paste at least 50 words, or drop in a public page URL.

  2. 2

    Stay under 3,000 words, or split a longer paper into sections.

  3. 3

    Hit Check AI score and wait for the percentage.

  4. 4

    Read the yellow, orange, and red lines, not only the number.

  5. 5

    Rewrite the stiff parts in your own voice and keep a copy of each version.

Questions

FAQs

Can DetectGPT detect Claude?

It can score finished Claude writing for model-like patterns. It cannot prove that Claude, rather than another model or a very tidy writer, produced the text.

Do I need a Claude account?

No. Paste the finished draft or analyze a public URL. DetectGPT does not access Claude chats.

Why did a careful human paragraph score high?

Formal, balanced prose can share the same even rhythm Claude uses. Read the highlighted sentences and compare them with writing you know is yours before you treat the number as a verdict.

Is the Claude check free?

Yes. No signup, up to 3,000 words. The general checker lives on the homepage.

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