How to Cite ChatGPT As A Source in Every Major Citation Style

Every few decades, a tool comes along that completely changes the way people work, write, and think. 

The printing press made knowledge accessible to everyone. The internet puts the whole world at your fingertips. Search engines made finding information effortless.

And now? Artificial intelligence is doing all three at once.

You've probably already felt it. The way AI can draft an email in seconds, explain a complex topic like you're five, or help you structure an entire research paper before your first cup of coffee is even finished. 

One AI tool in particular has taken the world by storm, and that is ChatGPT. 

Launched in late 2022, it surpassed 1 billion monthly active users in 2026, and a large share of them are students and researchers who use it every day for writing, studying, and academic work. 

Surveys even show that 66% of students globally now use ChatGPT for coursework.

So here's a question worth asking, and that is if so many people are using it, how many of them actually know how to cite it correctly?

Because using ChatGPT is one thing. Knowing how to cite ChatGPT in your essay, research paper, or report is a different skill entirely and one that most people quietly skip over.

As you are already here, I believe you’re also struggling with the same issue of proper citation. But don’t worry anymore because you are in the right place!

This guide covers every major citation style, APA, MLA, Harvard, and Chicago, with clear formats, real examples, and no unnecessary fluff. 

No matter if you're a student rushing a deadline or a researcher dotting every i, you'll find exactly what you need here.

So without further ado, let’s get started - 

What Information Do You Need Before You Cite ChatGPT?

Before you start formatting your citation, you need to gather a few basic details from the source. These apply across all citation styles. So let’s check them out!

How to Cite ChatGPT in APA (7th Edition)

APA, or the American Psychological Association, is the most widely used citation style in social sciences, education, and psychology, and it's the format most students search for when dealing with AI sources.

The American Psychological Association directly addressed this issue. According to the APA Style guidance, because "the results of a ChatGPT chat are not retrievable by other readers," quoting ChatGPT is "more like sharing an algorithm's output." 

That ultimately means you credit OpenAI as the author of the algorithm, with a full reference list entry.

Reference List Format

OpenAI. (Year). ChatGPT (Month Day version) [Large language model]. https://chat.openai.com

Example:

OpenAI. (2024). ChatGPT (March 15 version) [Large language model]. https://chat.openai.com

In-Text Citation

(OpenAI, 2024)

Used in a sentence:

The model identified three primary drivers of urban inflation (OpenAI, 2024).

Don’t forget that when you want to cite your work in APA format, it recommends mentioning your prompt directly in the body of your text, so your reader knows what question you asked. 

If the conversation played a bigger role in your work, include the full exchange as an appendix and reference it from there.

Quick Note

APA treats OpenAI like a corporate author just the same way you'd cite a government agency or a company report.

How to Cite ChatGPT in MLA Format

MLA style is standard in literature, humanities, and most high school and undergraduate writing classes. 

The updated version of MLA's official guidance is clear on this matter that writers should "cite a generative AI tool whenever they paraphrase, quote, or incorporate into their own work any content, whether text, image, data, or other that was created by it."

MLA also advises that you should not credit the AI as an author. Instead, the description of what was generated is treated as the source's title.

Works Cited Entry

"Your prompt text." ChatGPT, model GPT-4, OpenAI, Day Mon. Year, chat.openai.com.

Example:

"Explain the causes of World War I simply." ChatGPT, model GPT-4, OpenAI, 15 Mar. 2024, chat.openai.com.

In-Text Citation

Use the first word(s) of the Works Cited entry — which would be the beginning of your prompt:

("Explain the causes")

Or simply: (ChatGPT)

Remember that,MLA citation style recommends for any PDF or document, you should mention your prompt in the body of your text as well, not just in the citation. Something like: "When asked to explain the causes of World War I, ChatGPT responded that..."

How to Cite ChatGPT in Harvard Style

Harvard referencing is widely used in the UK, Australia, and many universities across South Asia and Europe. One thing to keep in mind is that there is no single "official" Harvard style, as it varies from one institution to another.

That said, the most widely accepted format looks like this:

Reference List Format

OpenAI (2024) ChatGPT [AI language model]. Available at: https://chat.openai.com (Accessed: 15 March 2024).

In-Text Citation

(OpenAI, 2024)

Used in a sentence:

Several content strategies were proposed by the tool, including long-form video and newsletter campaigns (OpenAI, 2024).

Important Note

Because Harvard isn't standardized, always check your university's own referencing guide before submitting. Some institutions have released specific rules for citing AI tools, and yours might be one of them.

How to Cite ChatGPT in Chicago Style

According to the Chicago Manual of Style, it's one of the oldest and most widely used citation systems in American academic publishing. 

A 2024 survey found that 77% of marketers use AI tools like ChatGPT in their work, which means Chicago-style citation is no longer just an academic concern; basically, it matters in professional writing too.

Chicago style is commonly used in academic letters, history, business proposals, fine arts, and social sciences. 

To make things easier, know that the Chicago style has two versions, and which one you need to use depends on your subject.

Think of it this way:

• Writing a history or arts paper? → Use Notes-Bibliography
• Writing a social science paper? → Use Author-Date

If you’re not sure which one your course uses? 

Then here’s a simple clue -

If your paper has footnotes that are written perfectly at the bottom of the page, that's Notes-Bibliography. If it uses (Author, Year) citations inside the text, that's Author-Date.

System 1: Notes-Bibliography

This system uses a small number at the end of your sentence, which links to a footnote at the bottom of the page.

Your sentence would look like this:

ChatGPT suggested several reasons for the fall of the Roman Empire.¹

Footnote at the bottom of the page:

1. OpenAI, ChatGPT, response to "your prompt," March 15, 2024, https://chat.openai.com.

Bibliography citation example that locates it at the end of your paper:

OpenAI. ChatGPT. "Response to [your prompt]." March 15, 2024. https://chat.openai.com.

System 2: Author-Date

This one works more like APA when you put a short citation directly inside your sentence, then list the full details at the end of your paper.

Your sentence would look like this:

ChatGPT suggested several reasons for the fall of the Roman Empire (OpenAI 2024).

Reference list (at the end of your paper):

OpenAI. 2024. ChatGPT. Accessed March 15, 2024. https://chat.openai.com.

Still unsure which system to use? Just check your assignment brief properly or ask your instructor, and they'll tell you which Chicago format they expect from your work.

Citing ChatGPT in Research Papers and Academic Writing

The citation format stays the same as per APA, MLA, Harvard, or Chicago, depending on your field. But research and academic writing come with extra responsibilities when it comes to AI.

A 2024 survey found that 26% of American teens used ChatGPT for schoolwork, which is up from 13% the year before. 

In fact, institutions like Harvard and Stanford now, in some contexts, allow the use of AI in their research papers with proper plagiarism checks and clear disclosure of its usage. 

The University of California system specifies that AI content must be cited like any other tool, but cannot replace peer-reviewed or primary sources.

So, the following are a few rules of thumb for academic writing that you might need - 

• Disclose Your Use: Many universities and journals now require a statement explaining how and where AI was used in your work.
• Save Your Conversation: You may need to include it as an appendix or provide it if asked, so it's better not to delete it right after. 
• Verify Everything: ChatGPT can and does produce inaccurate information, including citations that don't exist (a phenomenon known as "hallucination").
• Treat it as A Secondary Source: You can certainly use ChatGPT to support your argument, but it’s better not to count as the main evidence, as it is definitely not.

Essential Tip

ChatGPT conversations are not publicly accessible, so once the session is closed, no one else can pull up your exact exchange. Because of this, it’s recommended to save or take a screenshot of your conversation and, if required, include it as an appendix to your work.

How to Cite an Image Created by ChatGPT

Nowadays, ChatGPT (with DALL·E integration) can generate high-quality images from text prompts. In fact, sometimes it becomes really difficult to find out if those images were created by AI or not. 

But like other AI-generated text, those images need to be cited as well. Especially in academic papers, presentations, or published content.

APA format:

OpenAI. (2024). [Brief description of the image] [AI-generated image]. DALL·E 3 via ChatGPT. https://chat.openai.com

MLA format:

"[Your image prompt]." Image generated by ChatGPT/DALL·E 3, OpenAI, 15 Mar. 2024.

A couple of extra things to keep in mind before citing AI-generated images:

• Always add a caption labeling it as AI-generated (e.g., "Image created using ChatGPT/DALL·E 3")
• Be aware that some publishers, academic journals, and institutions do not permit AI-generated images at all, so always check their guidelines before including one

All Formats at a Glance for Your Quick Reference

You've made it through every citation style by reaching the bottom of the blog. 

Nice work! 

Now here's a clean summary of all the formats in one place, so you can come back to this table anytime without scrolling through the whole guide.

FAQs about How to Cite ChatGPT

Quick answers to the most common questions about how to cite ChatGPT correctly -

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

If no AI-generated text, ideas, or images appear directly in your work, a citation may not be required. That said, it's good practice to mention it, and some institutions ask for full disclosure of any AI involvement. When in doubt, check your school's policy.

How do you know which version of ChatGPT you used? 

If you're on the free plan, it's GPT-3.5. If you're on ChatGPT Plus, it's GPT-4. You can also check the model selector at the top of your chat window. 

How do I know which version of ChatGPT I used? 

GPT-3.5 is used on the free plan, and GPT-4 is available on ChatGPT Plus. You can also check the model selector dropdown at the top of your chat window before or during your session.

Can I quote ChatGPT directly in my paper? 

Yes, use quotation marks and cite it just like any other source. Just keep in mind that AI can produce inaccurate or fabricated information, so always verify key claims independently before including them.

What if my school doesn't allow AI use? 

Follow your institution's rules. This guide is specifically for situations where the use of AI is permitted and must be properly disclosed. If you're unsure whether you're allowed to use ChatGPT, ask your instructor before you do.

ChatGPT cited a source; should I cite ChatGPT or the original source? 

Go back to the original source and cite that directly. MLA specifically advises writers to "vet the secondary sources cited by a generative AI tool," because AI tools don't always cite accurately or at all.

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That’s it for How to Cite ChatGPT

Citing ChatGPT properly is not complicated once you know the format, and it's becoming more important every year. 

As AI continues to show up in classrooms, newsrooms, and research labs, clear and honest attribution is simply part of doing the work right.

One thing to keep in mind is that guidelines for citing AI are still evolving. 

APA, MLA, Chicago, Harvard, and other style organizations continue to update their guidance as tools like ChatGPT evolve. 

So, it's worth checking back periodically, especially before submitting important academic work.

Undoubtedly, the core idea stays the same across all styles, and that is to be transparent, give credit to the right source (OpenAI), record the date, and make it easy for your reader to understand how you used the tool. 

Simply just do that, and you're covered.

And if you want to skip the formatting stress altogether, CopyChecker's Citation Generator does the heavy lifting for you. 

Just enter your source details, and it builds the correct citation in APA, MLA, Harvard, Chicago, and more just in seconds, with zero guesswork.

Sources referenced in this article:

• MLA Style Center — "How do I cite generative AI in MLA style?" (Updated 2024)
• APA Style Blog — Guidance on citing ChatGPT and generative AI tools
• Pew Research Center — AI usage among US adults (2024)
• BrowserCat — ChatGPT usage statistics among students (2024)
• Turnitin — When and how to cite ChatGPT in MLA/APA formats