How do I cite Claude in Chicago?

To cite Claude in Chicago (18th edition), include the author, title, date, and source location. Use our free citation generator for automatic formatting.

How to Cite Claude in Chicago (18th edition)

Learn how to cite Claude chats and other Anthropic AI output in Chicago format (18th edition). This guide includes the reference list format, in-text citation examples, and key formatting rules.

Chicago Bibliography Format

Here is the standard Chicago format for citing Claude in your bibliography:

Cite in a note, not the bibliography: 1. Claude model name, response to “Text of your prompt,” Anthropic, Month Day, Year, https://claude.ai/share/….

Chicago Example for Claude

Chicago does not give Claude an entry in the bibliography — it is cited in a note only. Here is that note, written by hand and checked against the official Chicago guidance:

1. Claude Sonnet 4, response to “I’d like a list of grammar topics that a student should understand by the time they graduate from high school,” Anthropic, May 20, 2025, https://claude.ai/share/329173b2-ec93-4663-ac68-4f65ea4f166d.

Chicago In-Text Citation

Use one of these formats when referencing this source within your paper:

Parenthetical

Footnote: 1. Claude Sonnet 4, response to “I’d like a list of grammar topics that a student should understand by the time they graduate from high school,” Anthropic, May 20, 2025, https://claude.ai/share/329173b2-ec93-4663-ac68-4f65ea4f166d.

Narrative

Shortened note: 2. Claude Sonnet 4, response to “list of grammar topics.”

Key Chicago Formatting Rules

Credit Claude where its words appear, in your sentence or in a numbered note; CMOS 18 §14.112 does not usually list chatbot conversations in the bibliography.
In the note, the tool (Claude Sonnet 4) stands in the author position and Anthropic is the publisher.
If your sentence already gives the prompt, the note can read 1. Text generated by Claude Sonnet 4, Anthropic, May 20, 2025, followed by the share link.
Add the claude.ai/share link only if it opens without your login; otherwise end the note after the date.
If you edited Claude’s output, add “edited for style and content” at the end of the note; a bibliography entry is optional and only makes sense when the share link is public.

Step-by-Step Guide

Gather source information: Collect the author name, title, publication date, and URL or DOI for your Claude.
Format the reference: Arrange the elements following the Chicago (18th edition) template shown above.
Create the in-text citation: Add a parenthetical or narrative citation in your paper where you reference this source.
Add to your bibliography: Include the full formatted citation at the end of your paper.
Double-check formatting: Verify italics, punctuation, capitalization, and hanging indents match Chicago requirements.

Evidence and review notes

Worked examples on this page are written by hand from the style's own published guidance and checked against it, because the general CSL styles do not encode this source's rules. Editorial guidance and sources in this section were reviewed on 2026-08-14.

Metadata to collect

the company that built the tool (Anthropic)
the model shown in the chat, such as Claude Sonnet 4
the date of the conversation
the chat title Claude assigned or you set
the exact prompt you typed
the public claude.ai/share link

Common metadata traps

A claude.ai/chat/ address in your browser bar is private to your account; only the link created with the Share button (claude.ai/share/…) opens for readers.
A Claude share link is a snapshot of the conversation when you shared it, so messages you add later will not appear unless you share again and cite the new link.
Claude names its models by family and version (Sonnet 4, Opus 4.1), and APA’s own posts write them inconsistently, so copy the model name exactly as the chat displays it.

Editorial sources

Chicago Manual of Style — citation quick guide →

Frequently Asked Questions

How do I cite Claude in Chicago?: To cite Claude in Chicago (18th edition), include the author, title, date, and source location. Use our free citation generator for automatic formatting.
What is the Chicago format for Claude citation?: The Chicago format for Claude is: Cite in a note, not the bibliography: 1. Claude model name, response to “Text of your prompt,” Anthropic, Month Day, Year, https://claude.ai/share/….
What does the in-text citation look like for Claude in Chicago?: In Chicago, the in-text citation for the example above is Footnote: 1. Claude Sonnet 4, response to “I’d like a list of grammar topics that a student should understand by the time they graduate from high school,” Anthropic, May 20, 2025, https://claude.ai/share/329173b2-ec93-4663-ac68-4f65ea4f166d.