The author argues that Anthropic and OpenAI have achieved product-market fit, citing their sustained revenue growth, widespread adoption of their AI models, and the increasing integration of their technology into everyday tools and workflows as evidence of mainstream success.
Anthropic announced a run rate revenue of $47 billion, raised $65 billion in a Series H round, and achieved a post-money valuation of $965 billion.
Simon Willison argues Anthropic and OpenAI have found product-market fit through enterprise coding agents. Both companies shifted to API-based enterprise pricing, and recent models cost more. Stories of Uber blowing its AI budget and Microsoft canceling Claude Code licenses suggest customers are paying high prices for genuinely useful tools, making April 2026 a new revenue inflection point.