"Claude Code is writing all the code": Anthropic's output is up 8x, creator says

“I haven't written a line of code by hand in 8 months.”

At Fortune Brainstorm Tech, Anthropic Head of Claude Code Boris Cherny said AI now handles much of the coding process. As a result, the bottleneck has shifted from writing code to reviewing it—and Anthropic uses multiple Claude agents with different personas and perspectives to collaborate on code reviews.

“What we found is with this approach we catch pretty much every bug,” he said.