How to Cite ChatGPT and AI Tools (APA, MLA, Chicago)

The mechanical format for citing an AI tool, plus what to save so the citation is verifiable later.

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If you used ChatGPT (or Claude, or Gemini) to help brainstorm a section of a research paper and now your professor wants you to cite it, the style guides have caught up — but most students haven't. All three major styles (APA 7, MLA 9, Chicago 17) updated their guidance for AI tools in 2023 and 2024. How to cite ChatGPT looks different from citing a website and different from citing a software tool, and the details matter: your citation has to let a reader reconstruct what you asked and what you received.

PaperDraft is a writing assistant, not a paper generator — the draft is your starting point, not your submission. You are responsible for editing, verifying sources, and following your school's academic integrity policy.

This post is mechanical: it shows exactly how to format an AI tool citation in each style, with real examples. For the separate question of whether and how you should disclose AI use in a paper, see our AI disclosure in academic papers guide. For the broader citation framework across all source types, the pillar how to cite sources is the anchor.

The Basic Pattern

Every AI tool citation has five pieces:

  1. Author — the company that makes the tool (OpenAI, Anthropic, Google).
  2. Year — the year of the version you used.
  3. Title — the name and version of the tool.
  4. Version or model identifier — e.g., "GPT-4," "Claude 3.5 Sonnet."
  5. URL of the tool or publisher.

Because AI outputs are not retrievable by a reader (your conversation is usually private), the styles treat AI tools as a special kind of source — closer to a software or personal communication citation than a website.

APA 7 Format

APA 7 treats AI tools as software. Full reference entry:

In-text citation includes the prompt context:

APA's guidance, as of mid-2023, recommends describing the prompt in the text itself (not just as a parenthetical) because the reader cannot retrieve the conversation directly. Save the full prompt and response — APA suggests including it in an appendix for transparency.

MLA 9 Format

MLA 9's March 2023 guidance treats AI outputs as a distinct source type. The entry includes the prompt you used as the title of the source.

In-text:

MLA explicitly recommends saving a PDF or screenshot of the conversation because the output isn't reproducible.

Chicago 17 Format

Chicago's 2023 update treats AI tools more like personal communications. Chicago 17 suggests a footnote or parenthetical rather than a full bibliography entry, unless the AI output is central to your paper.

If you do include it in the bibliography:

Citing Claude, Gemini, and Other AI Tools

The same pattern works across tools. Only the author name, tool name, and URL change.

The version or model identifier is especially important for AI tools. Model versions change frequently — a GPT-4 response in March 2024 is not the same model as a GPT-4 response in October 2024.

What to Save So the Citation Is Verifiable

Because AI outputs can't be retrieved by your reader, you take on responsibility for preserving the source. At minimum, save:

Many programs require you to include the full prompt and response in an appendix. Check your instructor's policy.

Trying to format an AI citation at 1am and realizing you never saved the prompt you used last week? PaperDraft gives you a structured first draft with citation stubs in the style you choose — APA, MLA, or Chicago — which you verify against the original source. It's a drafting assistant, not a submission. Try PaperDraft — free

Common Pitfalls With AI Citations

Unlike book or journal citations, AI citations can't be verified by a reader checking your bibliography. That creates two common integrity problems:

Mechanical pitfalls:

Always verify:

How a Drafting Assistant Fits

PaperDraft produces a structured draft with citation stubs for sources you name. It does not invent sources, and it does not replace the responsibility to verify each citation. When you cite an AI tool in your own paper, you format the citation yourself following the style your instructor requires — PaperDraft's role is the drafting scaffold, not the verification of your AI citations. We scaffold; you verify. Anything you pull from an AI conversation (whether ChatGPT, Claude, or another tool) you cite and disclose per your program's policy.

FAQ

Do I have to cite ChatGPT if I only used it for brainstorming?

Policies vary. Many programs require disclosure for any substantive use, including brainstorming. Check your instructor's syllabus. When unsure, disclose — the cost of overdisclosure is low; the cost of hidden AI use if it's flagged is high.

What if the AI gave me a citation that turned out to be fake?

Don't use it. AI tools fabricate citations — this is a well-documented failure mode. Never cite a source the AI named without confirming the source exists and says what the AI claimed. If you already submitted and realize a citation was fabricated, disclose it to your instructor before someone else finds it.

Can I use a citation generator instead of writing citations by hand?

Citation generators don't handle AI tool citations well because the format is newer than most tools' templates. Use the side-by-side examples above as your starting point and verify against your instructor's specific requirements. Our citation tools guide covers the broader verification workflow.

How is AI citation different from citing a software tool?

APA treats them as a subtype of software. The key addition is the model or version identifier, because AI outputs vary by version in ways that regular software citations don't. Save the conversation so the citation is meaningful.

Should the prompt go in the bibliography or the body?

MLA puts the prompt in the Works Cited entry as the title. APA recommends describing the prompt in the body text and often including the full exchange in an appendix. Chicago typically handles the prompt in a footnote.

For other digital source types that follow a similar pattern, see our how to cite a website post.

Related reading

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You are responsible for editing, verifying sources, and following your school's academic integrity policy. See our academic responsibility guide.