Will this app give me my GPTZero score?
No. GPTZero's scoring model is proprietary and out of reach for any outside tool. The app reports Grok-style perplexity and burstiness patterns instead.
Is the Grok GPTZero checker free?
Yes. 5 free checks in any rolling 24 hours, with no account and nothing to buy.
Is this affiliated with GPTZero or xAI?
No. It's an independent app with no partnership, affiliation or endorsement from either company.
Is my text stored?
It's sent to our AI server to be scored and that's the extent of its use, not published, shared or needed again once the result returns.
What is perplexity?
How predictable each next word is to a model. Grok's blunt, plain-spoken statements often score on the predictable side.
What is burstiness?
How much that predictability shifts across a document. Grok's mix of a short blunt line and a longer qualifier produces real length variation.
Does low perplexity always mean Grok wrote it?
No. A naturally blunt, plain-spoken human writer can score just as low for entirely unrelated reasons.
Does a high score mean the writing is definitely human?
No. Heavily edited Grok text can shift both measures without the underlying content actually changing.
Can the app guarantee a low GPTZero score?
No tool can promise that against a private, constantly updated system.
Does the app rewrite my text?
No. It only reports the patterns it finds. Nothing about your wording changes.
Why do opinion writers get flagged so often?
A direct, blunt style is a deliberate craft choice in commentary, producing the same pattern this check looks for.
What should I do if I'm wrongly accused of using Grok?
Keep drafts and version history, and ask specifically what pattern was flagged rather than arguing against a bare score.
Does text length affect the result?
Yes. A single sentence gives the app little to work with. A full paragraph produces a steadier read.
Does it work on non-English text?
The pattern set is tuned for English. Other languages may not trigger the same signals reliably.
Is there a batch mode or an API?
Not yet. Checks run one at a time, up to 5 per rolling 24 hours.
What happens after I use all 5 checks?
The check pauses until the rolling window frees up allowance again. There's no paid tier to skip the wait.
Does the app work on phones?
Yes. The checker and its results both work in a phone browser.
Should I use this instead of an official AI-detection tool?
No. Use it as an early, informal read, and follow whatever policy actually applies to the document.
Does formatting or paragraph length change the result?
It can. Very short paragraphs give the app less rhythm to measure, so a longer sample generally produces a more reliable read.
Does it matter which Grok model wrote the text?
The check looks at rhythm and tone habits shared broadly across Grok's outputs rather than tying the read to one specific version.
Is there a way to see the raw perplexity number?
No, the app reports named patterns with reasons rather than the underlying numeric scores.