/plagiarism — Check Plagiarism

Check text for plagiarism The /plagiarism command scans pasted text against online sources and reports how much of it matches existing content on the web. How to use Type /plagiarism followed by th...

Check text for plagiarism

The /plagiarism command scans pasted text against online sources and reports how much of it matches existing content on the web.

How to use

Type /plagiarism followed by the text you want to check:

/plagiarism [paste the text you want to check]

Paste the text directly into the message — /plagiarism does not take file uploads. The input must be between 100 and 120,000 characters per scan. The composer shows a live character count while you type so you can see when you have enough text.

You can also just ask the agent to check a passage for plagiarism — it runs the same check as a tool call.

What you get back

The result card shows:

Originality score — the percentage of the text that appears original, with a score bar
Verdict — Original (under 10% matched), Minor Matches (10–30%), or Plagiarism Found (30%+)
Matched sources — an expandable list of the pages that matched, each with its own match percentage and a link to the source

Cost

Plagiarism checks cost 6 credits per 1,000 characters of input, billed per 1,000-character block. The minimum charge is 6 credits.

Text length	Cost
Up to 1,000 chars	6 credits
~5,000 chars	30 credits
~20,000 chars	120 credits
120,000 chars (max)	720 credits

If a scan fails, the credits are refunded automatically.

/plagiarism requires a paid plan (Pro, Ultra, or Max) or a team seat. Scans run against English-language sources.

Use cases

Academic integrity — check papers and essays before submitting
Content creation — verify originality before publishing
Quality assurance — confirm outsourced or AI-assisted drafts are unique
Research — catch accidental duplication in compiled notes

Best practices

Check before submitting important content
Rewrite or properly quote any flagged sections
Cite matched sources instead of leaving the overlap in place
Use results as a verification signal, not proof of intent — a high match on a quoted passage with a citation is expected

/detect — check whether text was AI-generated
/humanize — rewrite text to read naturally
/summarize — condense long documents
Developers can run the same check via POST /v1/text/plagiarism on the Krater API or the check_plagiarism MCP tool.

More in Slash Commands

See Krater pricing or contact support.