Perplexity: real-time web retrieval, 5-10 citations per answer, prioritizes fast-loading crawlable pages with direct answers in the first 2-3 paragraphs — most accessible channel for new content. Claude: for knowledge questions, primarily driven by training data coverage — third-party mentions across multiple domains matter more than current web content. ChatGPT with browsing: prioritizes current, indexed, structured, authoritative content. Gemini: Google knowledge graph integration — Google Business Profile and structured data matter most. Optimize for each model differently. System at omnionlinestrategies.com/ai-discoverability-demo.