Claude uses Brave Search and prioritises factual accuracy above everything else
Claude AI uses Brave Search as its search backend, with 86.7% alignment between Claude's citations and Brave's top results. But Claude is the most conservative citer of all major AI tools — it will reject an otherwise excellent page if it contains a single factual error. Getting cited by Claude requires a different strategy than ChatGPT or Perplexity.
How Claude selects sources
When Claude needs to cite current information, it generates targeted search queries, retrieves the top results from Brave Search (typically around 10 results per query), filters and evaluates each page, and then cites only the sources that pass its quality threshold.
Anthropic's Citations API, launched in June 2025, provides exact sentence-level references — meaning Claude doesn't just link to a page, it points to the specific sentence it's citing. This raises the quality bar significantly: every sentence in your content needs to be accurate and verifiable.
What Claude values in sources
Factual accuracy is non-negotiable
A single factual error on a page can disqualify the entire page from citation. Claude is trained to be cautious and will skip sources that contain unverified claims, exaggerated statistics, or incorrect technical details. This is particularly relevant for YMYL (Your Money or Your Life) categories: health, finance, legal, and cybersecurity.
Primary sources over secondary summaries
Claude prefers original research, official documentation, and primary data sources over secondary summaries, aggregators, or rewritten content. If you're writing about the Australian Privacy Act, link to and reference the actual legislation rather than summarising someone else's summary.
Visible publication and update timestamps
Pages with clear publication dates and "last updated" timestamps perform better in Claude's source evaluation. According to BrightEdge research, Claude weighs content freshness as a trust signal — undated content is treated as less reliable.
Balanced perspectives with nuance
Claude favours content that acknowledges complexity, presents multiple viewpoints, and avoids absolute claims. Writing "VAPT is essential for every business" is less likely to be cited than "VAPT is recommended for businesses handling sensitive data, though the scope depends on the regulatory environment and threat profile."
Recognised author expertise
Pages with identifiable, qualified authors are preferred over anonymous or generic content. Author bios, credentials, and links to professional profiles (LinkedIn, industry publications) strengthen the expertise signal.
Acknowledgment of limitations
Claude is specifically tuned to value content that acknowledges what it doesn't know or can't guarantee. Phrases like "results vary depending on your specific environment" or "consult a qualified professional for advice specific to your situation" actually increase citation likelihood rather than weakening authority.
How to optimise for Brave Search
Since Claude relies on Brave Search, you need your content indexed and ranking well on Brave:
- Submit your site to Brave — Brave has its own web index built independently from Google and Bing. Submit your site at search.brave.com/help/webmaster
- Clean, semantic HTML — Brave's crawler emphasises well-structured HTML with proper heading hierarchy, semantic elements, and accessible markup
- Fast page loads — Brave deprioritises slow-loading pages. Core Web Vitals matter for Brave ranking
- Privacy-respecting pages — Brave was built around privacy. Pages heavy with trackers, consent walls, or aggressive JavaScript may be deprioritised
The 30-60 day optimisation timeline
According to BrightEdge research, updates to existing high-authority pages typically take 30-60 days to reflect in Claude's citation patterns. This is slower than ChatGPT (which benefits from faster Bing indexing via IndexNow) but more stable — once Claude starts citing your content, it tends to continue doing so consistently.
Claude vs ChatGPT vs Perplexity: citation comparison
- ChatGPT — volatile citations, Bing-based, rewards content volume and consistency across query variations
- Perplexity — most stable citations, proprietary index, rewards topical depth and JSON-LD schema
- Claude — conservative citations, Brave-based, rewards factual accuracy and nuance over volume
An effective GEO strategy targets all three, because each uses different search backends and different quality criteria.
Is Claude recommending your competitors?
RabbiiCo Studio's free AI Visibility Audit checks whether Claude, ChatGPT, Perplexity, and Gemini cite your business — and identifies the specific gaps preventing citation.