RAG — the architecture behind ChatGPT browsing, Claude web search, Perplexity, Google AI Overviews. Why published content is now retrieval inventory, why GEO is the discipline, and what comms teams must operationalize.
Dario Amodei co-founded Anthropic in 2021 and built Claude. The former OpenAI VP of Research is the public face of the AI safety camp inside the frontier labs.
Communications teams notice major LLMs like ChatGPT and Claude behave differently. These differences reflect distinct architectural choices, training, and product decisions. Understanding them is crucial for AI visibility work, as strategies optimized for one model may neglect the other. Anthropic emphasizes careful, source-grounded responses, while OpenAI focuses on broader retrieval and conversational synthesis. This means Claude often pulls from primary documents, while ChatGPT prioritizes earned media density and recency. Learn how to adapt your content strategy for each.
Answer engines — ChatGPT, Claude, Gemini, Perplexity, Google AI Overviews — now answer most early-stage buyer research. The pillar on how they decide which brands get cited.
Citation Share is the headline metric of GEO — but a program with only Citation Share is a scorecard, not an operating system. The full seven-metric stack: Citation Share, Entity Authority, Retrieval Frequency, Prompt Coverage, Crawl Health, Cross-Engine Variance, Citation Decay Rate.
Citation Share is the share of AI-generated answers in which a brand appears. The KPI behind GEO, how it is measured, what it captures, what it does not, and how to set up a Citation Share program.
When a brand fixes its citation graph, the engines reflect it on staggered timelines: Perplexity in days, ChatGPT in days-to-weeks, AI Overviews in weeks, Gemini in weeks-to-months, Claude on the next training cycle. Wikipedia is the multiplier.
EPR's Beauty PR pillar — nine sub-specialties, the press pool, the wellness-beauty convergence, and how brands win Citation Share inside ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews.
A directional modeling study of how five AI engines surface and rank 28 crypto and Web3 brands across 62 prompts. Bitcoin and Ethereum anchor the category; Coinbase dominates US-exchange citation; the named founder beats the anonymous team.
Claude is the answer engine that most rewards analytical depth, named authorship, and long-form editorial. Here is the complete guide to earning citation in Claude's answers.