Sources cited by Claude.
Claude can search the web and cite specific URLs in its responses. It tends to prefer authoritative sources: documentation, academic papers, and established media outlets. When web search is enabled, Claude provides numbered citations linking directly to the source pages.
How Claude uses sources.
Claude provides numbered inline citations when using web search. It favors documentation sites, Wikipedia, academic sources, and authoritative media. Claude's citation style is structured: each claim gets a bracketed reference linking to the source URL. For technical queries, GitHub and Stack Overflow appear frequently.
What Claude cites most often.
Wikipedia
wikipedia.org
The free encyclopedia. A foundational knowledge source for every major LLM's training data and real-time retrieval.
See data→GitHub
github.com
The world's largest code hosting platform. LLMs cite repositories, README files, issues, and discussions.
See data→Stack Overflow
stackoverflow.com
The largest developer Q&A platform. A top source for code examples, error resolution, and technical explanations in LLM responses.
See data→Medium
medium.com
Open publishing platform. LLMs cite Medium articles for thought leadership, tutorials, and industry analysis.
See data→reddit.com
The internet's largest forum. Subreddits cover every topic, from product recommendations to technical troubleshooting. LLMs frequently cite Reddit threads as first-hand user experiences.
See data→Hacker News
news.ycombinator.com
Y Combinator's tech community. Cited for developer opinions, startup discussions, and tech industry commentary.
See data→Every domain we watch for Claude.
💬Forum sources.
4 trackedDiscussion forums and Q&A sites
reddit.com
The internet's largest forum. Subreddits cover every topic, from product recommendations to technical troubleshooting. LLMs frequently cite Reddit threads as first-hand user experiences.
See data→Stack Overflow
stackoverflow.com
The largest developer Q&A platform. A top source for code examples, error resolution, and technical explanations in LLM responses.
See data→Quora
quora.com
Q&A platform covering broad topics. Cited for expert opinions, personal experiences, and long-form answers.
See data→Hacker News
news.ycombinator.com
Y Combinator's tech community. Cited for developer opinions, startup discussions, and tech industry commentary.
See data→⭐Review sources.
4 trackedSoftware and product review sites
G2
g2.com
The largest B2B software review platform. LLMs cite G2 reviews for software comparisons, ratings, and buyer sentiment.
See data→SourceForge
sourceforge.net
Open-source software directory and review platform. Cited for software downloads, reviews, and project comparisons.
See data→Capterra
capterra.com
B2B software review and comparison platform. Cited for software category lists, feature comparisons, and user reviews.
See data→Trustpilot
trustpilot.com
Consumer review platform. Cited for business reputation, customer sentiment, and service quality assessments.
See data→👥Social sources.
3 trackedSocial networks
linkedin.com
The professional social network. LLMs cite LinkedIn for company profiles, professional bios, and industry discussions.
See data→X (Twitter)
x.com
Real-time social platform. Grok has native access; other LLMs cite X posts for trending topics, opinions, and announcements.
See data→YouTube
youtube.com
The largest video platform. LLMs reference YouTube for tutorials, reviews, and educational content via metadata and transcripts.
See data→📚Wikipedia sources.
1 trackedWikipedia and wikis
📖Documentation sources.
1 trackedTechnical docs and code repos
📋Directory sources.
1 trackedProduct directories and listings
📰Media sources.
1 trackedNews and publications
Questions about Claude sources.
Other AI models we track.
ChatGPT
OpenAI
OpenAI's conversational AI. The most widely used LLM, with browsing and retrieval capabilities that pull from a broad range of web sources.
View sources→
Perplexity
Perplexity AI
An answer engine built around citations. Every response includes numbered source links from live web retrieval.
View sources→
Gemini
Google's AI model. Powered by Google Search, it retrieves and cites live web results with deep integration into Google's index.
View sources→Track which sources LLMs cite for your brand.
xSeek monitors 180+ domains across ChatGPT, AI Overview, Claude, Perplexity, Gemini, and Grok. See exactly when and where your brand gets cited.