As AI tools become integrated into academic workflows, proper citation has become essential. This guide provides authoritative formats for citing ChatGPT and other AI assistants across major academic styles, based on the latest guidance from style manual publishers.
When to Cite AI Tools
You should cite AI tools when:
Quoting AI output directly: If you include text generated by an AI in your work (even in quotation marks), citation is required.
Paraphrasing AI content: If you use AI-generated ideas that you've rephrased, citation is required.
Describing AI methodology: If AI tools were part of your research methodology (e.g., data analysis), describe and cite them in your methods section.
Building on AI suggestions: If an AI tool substantially shaped your thinking or approach, acknowledge this.
You typically don't need formal citations for:
Grammar/spelling assistance: Using AI like Grammarly for editing (though acknowledgment may be appropriate).
Personal comprehension: Using AI to understand concepts without including its outputs in your work.
Brainstorming privately: Using AI for idea generation when the final ideas are substantially your own.
APA 7th Edition Format
The American Psychological Association updated its guidance in 2023 to address AI citations.
Reference list format:
Author. (Year). *Title of AI tool* (Version) [Type of AI model]. Publisher. URL
Example:
OpenAI. (2024). *ChatGPT* (Jan 15 version) [Large language model]. https://chat.openai.com
In-text citation:
(OpenAI, 2024) or OpenAI (2024)
Including the prompt:
When relevant, describe the prompt in your text: 'When prompted with "Explain the key differences between qualitative and quantitative research," ChatGPT (OpenAI, 2024) generated...'
Key APA notes:
- Treat the AI company as the author
- Include the version or date of the AI you used
- Specify the type of model in brackets
- Include the URL where the AI can be accessed
- Note that AI outputs cannot be retrieved by readers (no stable URL to specific output)
MLA 9th Edition Format
The Modern Language Association provides guidance for citing AI as a tool that generates text.
Works Cited format:
"Prompt text" prompt. *AI Tool Name*, version, Company, Date, URL.
Example:
"Explain the key differences between qualitative and quantitative research methodologies" prompt. *ChatGPT*, GPT-4, OpenAI, 15 Jan. 2024, chat.openai.com.
In-text citation:
Use a shortened form: ("Explain the key differences" prompt)
Alternative format (tool as author):
OpenAI. *ChatGPT*. GPT-4 version, 15 Jan. 2024, chat.openai.com.
Key MLA notes:
- The prompt itself can serve as the 'title' of the source
- Include the AI version and access date
- MLA emphasizes that AI cannot be an 'author' in the traditional sense
Chicago/Turabian Format
The Chicago Manual of Style (17th ed.) treats AI outputs as personal communications or unpublished materials.
Notes-Bibliography style (footnote):
1. OpenAI, ChatGPT, response to "Explain the key differences between qualitative and quantitative research methodologies," January 15, 2024, https://chat.openai.com.
Bibliography entry:
OpenAI. ChatGPT. Response to "Explain the key differences between qualitative and quantitative research methodologies." January 15, 2024. https://chat.openai.com.
Author-Date style:
(OpenAI 2024) in text, with full reference in the reference list.
Key Chicago notes:
- Treat as you would a personal communication
- Include the prompt to provide context
- Some instructors may prefer AI citations only in footnotes, not the bibliography
Harvard Format
Harvard referencing varies by institution, but the general approach follows:
Reference list format:
Author (Year) *Title* (Version) [Type]. Available at: URL (Accessed: Date).
Example:
OpenAI (2024) *ChatGPT* (Jan 15 version) [Large language model]. Available at: https://chat.openai.com (Accessed: 15 January 2024).
In-text citation:
(OpenAI, 2024) or According to ChatGPT (OpenAI, 2024)...
Key Harvard notes:
- Harvard style varies by institution—check your university's specific guidelines
- Include access date, as AI outputs are not stable
- Describe the prompt in your text when relevant
Special Cases
Citing other AI tools:
The same principles apply to Claude (Anthropic), Gemini (Google), Copilot (Microsoft), and other AI assistants. Use the company as author and specify the tool and version.
Claude example (APA):
Anthropic. (2024). *Claude* (Claude 3 version) [Large language model]. https://claude.ai
AI-assisted data analysis:
If AI tools were used in your methodology (e.g., Python libraries with AI components), cite them as software: Developer. (Year). *Software Name* (Version) [Computer software]. URL
AI-generated images:
For AI image generators, include the prompt and tool: OpenAI. (2024). *DALL-E 3* [AI image generator]. Image generated from prompt: "[your prompt]." https://openai.com/dall-e-3
When AI writes the citation:
Never let AI generate your citations without verification. AI frequently 'hallucinates' fake sources. Always verify every citation independently.
Conclusion
Citing AI tools correctly demonstrates academic integrity and helps readers understand how AI contributed to your work. When in doubt, err on the side of more disclosure rather than less. As AI citation standards continue to evolve, check for the latest guidance from your style manual and institution.