Claude isn't ChatGPT with a different logo. Anthropic built a model with distinct citation criteria, preferred sources, and response style. In 2026 Claude reaches 12% AI usage share in Spain and grows especially in professional profiles. Getting recommended in Claude requires a specific strategy.
What makes Claude different
Anthropic trained Claude with strong emphasis on safety, structured reasoning, and epistemic honesty (admitting what it doesn't know). In practice this translates into longer, more nuanced responses with more explicit citations than ChatGPT. For a brand, this is good news: if your content has real authority, Claude tends to cite you literally and with clear attribution.
The sources Claude prioritizes
Analysis of thousands of Claude responses shows a clear priority pattern: 1) academic articles indexed in Google Scholar, arXiv, PubMed; 2) top-tier journalism (Reuters, AP, FT, The Economist, Le Monde, El País); 3) official corporate technical documentation (whitepapers, product docs); 4) Wikipedia/Wikidata for encyclopedic data; 5) long corporate blogs with authorship signed by an identifiable expert. Sources Claude downweights: generic SEO content, low-value aggregators, sites without Schema.org Author.
Content format Claude cites
Claude prefers articles of 1,500-3,500 words with clear structure, informative headings, verifiable quantitative data, and citations to primary sources within the text (not just at the end). Use of FAQ schema and HowTo schema improves extraction. Overly promotional texts are implicitly penalized: Claude detects commercial tone and prefers neutral sources.
Operational actions to appear in Claude
1) Reinforce your author entity. Each article should have Schema.org Author with sameAs pointing to LinkedIn, ORCID, and author profile. 2) Cite primary sources explicitly. Not "according to a recent study"; instead "according to the Smith et al. (2025) study published in Journal of X." 3) Publish downloadable whitepapers. Claude crawls PDFs if they're well linked from HTML. 4) Allow ClaudeBot in robots.txt. User-agent: ClaudeBot / Allow: /. 5) Register your brand in Wikidata. It's the most-used training base by Claude.
What does NOT work in Claude
Keyword stuffing tactics, brand repetition in every paragraph, massive affiliate links, and AI-generated content without human review are strongly disfavored. Claude has synthetic-content detection mechanisms and applies them to internal source ranking. A brand whose content is identified as "low-effort AI" loses citations for months.
How to measure your presence in Claude
GEOMOND's Presence Index includes Claude as an evaluated model since 2024. The prompt set is executed against Claude 3.5 Sonnet (stable public model) each month. The Spanish average Presence Index Claude for B2B SMBs is 22 points in March 2026; leading brands exceed 60.
Why Claude matters more each quarter
Anthropic has signed B2B deals with major consultancies (Accenture, BCG) and European public administrations. When those prospects research providers, they do it from Claude. Appearing in Claude isn't just market share: it's market share in the highest-value segment.
At GEOMOND the Claude component of the Presence Index is one of the KPIs reported to clients each month. Request the free audit and discover your current position in Claude vs. direct competitors.
Frequently asked questions
How does Claude differ from ChatGPT for a brand?
Claude (Anthropic) prioritizes academic sources, verified journalism and extensive reasoning. Brands with whitepapers, arXiv papers, mentions in El País, Expansión, Cinco Días or Financial Times perform better than on ChatGPT, which is more generalist.
What kind of content does Claude cite most often?
Long-form documents (>2,000 words) with structured argumentation, citations to primary sources and verifiable authorship. University PDFs, corporate blogs with E-E-A-T and sector reports with clear methodology are the preferred formats.
Is it worth optimizing for Claude if my client only uses ChatGPT?
Yes: Claude is integrated in Slack, Notion and Cursor where your B2B client already is, and many corporate APIs use Claude for extensive reasoning. Anthropic enterprise share exceeds 30% in 2026.