The Founder's Playbook: Building an AI-Native Startup

Anthropic's blog hosts 'The Founder's Playbook,' a guide for entrepreneurs building AI-native startups. It advises on choosing between using existing foundation models vs. training custom ones, emphasizing that most startups should leverage APIs. The playbook covers prompt engineering, retrieval-augmented generation (RAG), fine-tuning, and evaluating model outputs. It also discusses go-to-market strategy, pricing, and regulatory considerations. A key section addresses building moats: data network effects, domain expertise, and integration depth. The guide includes case studies from companies like Notion and Harvey. It stresses that AI is a feature, not a product, and that solving a real user problem is paramount.