Anthropic Engineers Ship Eight Times More Code Than Before
Even designers and product managers check in code, so verification is now the hard part.
Lenny's Podcast: Product | Growth | Career · What happens after coding is solved? | Fiona Fung (Claude Code & Cowork)At Anthropic, engineers now produce roughly eight times more code each quarter than they did from 2021 to 2025. For years, output was flat, then it shot straight up.
Fiona Fung, who leads Claude Code and Cowork at Anthropic, remembers when software shipped on discs. Teams faced firm factory deadlines, so they planned carefully because engineering time was precious.
That constraint is gone. Not long ago, people wrote essentially all code by hand, and now much more of it is machine-assisted. "Coding is no longer the bottleneck," Fung says. On her team, designers, product managers, and others all check in code. With so much more code arriving from so many more hands, the hard job is verification, making sure it all works.
Questions people ask
Does shipping more code mean better products?
Not necessarily. More code means more features, fixes, and experiments can be tried quickly, but it also means more chances for bugs and clutter. The test is whether the extra output helps users and serves what the business is trying to do.
How do teams check code when so much is coming in?
In general, software teams combine automated tests with human review of the riskiest changes. They often write down what good looks like as a specification or test, then check new code against it before it ships.