Does ChatGPT make up citations?

Yes. Large language models generate text that statistically looks correct, and a citation is a highly regular pattern, so a model can produce a perfectly formatted reference — author, year, title, journal, DOI — with no real source behind it. The only reliable defence is to verify each reference against authoritative databases.

How do I check if a ChatGPT citation is real?

Paste the reference into CiteProve. It resolves any DOI, PMID or arXiv ID, then searches Crossref, OpenAlex, PubMed and CourtListener for a matching record. If nothing is found it is flagged as not found; if a real source is found with differing fields it is flagged as partial with a field-level diff.

Is the ChatGPT citation checker free?

Yes — verifying that references exist and that their metadata is correct is free and requires no account.

ChatGPT citation checker

Verify references generated by ChatGPT, Claude, Gemini or Copilot before you rely on them. Paste your list below — CiteProve checks each citation against real databases and flags the ones that don't exist.

In short

ChatGPT and other AI assistants fabricate citations that look completely plausible — real-sounding authors, well-formed DOIs, invented journals. To check whether a ChatGPT citation is real, verify it against authoritative databases (Crossref, OpenAlex, PubMed, CourtListener) rather than trusting how polished it looks. CiteProve does this for an entire reference list in seconds, free and with no account.

Paste your AI-generated references

Why ChatGPT invents references

A language model predicts plausible text. It has no index of what has actually been published, so when asked for sources it assembles a citation that fits the pattern — often stitching a real author to a title that was never written, or attaching a genuine-looking DOI to a paper that doesn't exist. These fabrications have already reached courtrooms, peer review and graded coursework.

What the checker flags

Pure inventions no database can locate
Real DOIs or PMIDs that resolve to a different paper than cited
Mangled real papers — wrong year, swapped authors, near-miss titles
Retracted studies, surfaced with a prominent retraction flag

Frequently asked questions

Does ChatGPT make up citations?: Yes. Large language models generate text that statistically looks correct, and a citation is a highly regular pattern, so a model can produce a perfectly formatted reference — author, year, title, journal, DOI — with no real source behind it. The only reliable defence is to verify each reference against authoritative databases.
How do I check if a ChatGPT citation is real?: Paste the reference into CiteProve. It resolves any DOI, PMID or arXiv ID, then searches Crossref, OpenAlex, PubMed and CourtListener for a matching record. If nothing is found it is flagged as not found; if a real source is found with differing fields it is flagged as partial with a field-level diff.
Is the ChatGPT citation checker free?: Yes — verifying that references exist and that their metadata is correct is free and requires no account.