AI writes 100% of the code at Anthropic, OpenAI top engineers say—with big implications for the future of software development jobs

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.

“For me personally...