Engineers in Silicon Valley have been raving about Anthropic’s AI coding tool, Claude Code, for months. “The craziest thing was learning three months ago that half of the sales team at Anthropic uses Claude Code every week.”AI-powered coding has evolved quickly. Cherny says Anthropic built Claude Code for where AI capabilities were headed, rather than where they were at launch. Ultimately, he says, Claude Code worked better for his senior engineers than tools from Cursor and Windsurf. In November, Anthropic announced that Claude Code had reached $1 billion in annualized recurring revenue, less than a year after its debut.