At Anthropic—an AI lab building some of the world’s most advanced models—engineers are no longer writing the code that powers their products; they’re outsourcing it to AI. The head of Anthropic’s Claude Code, Boris Cherny, has announced he hasn’t written any code in more than two months.
In a post on X, Cherny said 100% of his code is now written by Anthropic’s Claude Code and Opus 4.5. Across the rest of the company, he says “pretty much 100%” of code is also AI-generated.
