Boris Cherny: "Claude Code is 100% written by Claude Code, Cowork is 100% written by Claude Code" across all of Anthropic, 90% of code is written by Claude lawyers, designers, finance people are building real things with Claude Code right now with no CS degree, no background, nothing the... people who built the tool use the tool to build the tool think about what that means for everyone else the guide on everything Claude can actually do is in the article belowshow more

I feel like my life will soon be written by Claude Code

@Jeyxbt XD

worth paying attention

Legendary watch, brother. Watching each interview with Boris.

lawyers and designers shipping code with zero cs background is the real signal. what's the error rate look like six months in?

i'm totally agreed with Boris Cherny there

90% code from Claude in a company building Claude is selection bias, not evidence of broader capability. Show me those metrics for companies without that incentive alignment.

non cs folks building is the win

If “90% of code is written by Claude,” the key fact is not the percentage, it’s the implication that *human authorship is moving up a layer*. Engineers are no longer primarily writing instructions line by line, but defining constraints, reviewing outputs, and steering systems that generate most of the implementation.

the real flex is the people who made the tool are still using it daily

クロードコードは100％クロードコードによって書かれ、全Anthropicの90％のコードはクロードによって書かれています。弁護士、デザイナー、財務スタッフは今、クロードコードで本当にものを作っています。CSの学位もプラットフォームも何もありません。ツールを使ってツールを作っている人々。これが他の人々にとってどんな意味があるか考えてみてください。クロードが本当にできるすべてのガイドは下の記事にあります。

90% of Anthropic's own code written by Claude means they're the best proof of concept for their own product

Do you separate generation rate from acceptance when reporting that 90%?

Does "90% of code" include tests, docs, and config files too?

no cs degree flexing lol

can Claude create a google map extractor that cost $80 USD

That makes sense him to said that being part of antrophic, btw this comment was written by Claude as well 🤣

That's amazing! Coding for everyone, even lawyers & designers. The future is here! 🚀💻

So quit your job, Boris.

Boris is legend as always

90% self-generated code at Anthropic is a real data point, not just marketing. The non-CS builders part is the bigger signal — when the barrier to production-level output drops that low, supply-side dynamics shift fundamentally.

So a construction worker with a power drill is now a structural engineer?

the people who built the tool use the tool to build the tool

If everything is built with what the tool knows until this point in time, how does it improve? It doesn’t make sense. You need manual code

Significa che non controlliamo cosa costruiamo. Al momento funziona, nel medio lungo periodo non lo sappiamo. Magnifica Humanitas è la bussola Claude (che amo) il timone

curious what '90% written by Claude' actually means is that generation rate or acceptance rate? at my scale those diverge a lot, not sure they're tracking the same thing

no CS degree" works because the layer between intent and code got thinner, not because programming got easier. you still need to scope correctly and recognize broken output. those skills are general. the CS degree was a proxy for them.

AI自己写代码，非技术人也能上手，未来已来。

Boris so smart

The fact that you believe this shows how ignorant you are about marketing.

This is why AI literacy matters now more than ever. The barrier to building things is dropping fast, and people who learn AI early will have a huge advantage. & Rohvaa genuinely helped me understand AI practically instead of feeling overwhelmed by it.

That explains why it is so shitty

Self-bootstrapping codegen is the real flex. When the tool builds itself, the eval gate is the codebase itself - regressions show up as bugs, not benchmarks. That feedback loop is what compounds. Same architecture trick -

every time i learn something new from you articles

This isn’t my article, but it’s really good. I liked it.

Ninety percent AI written code inside the company that built the tool shows the stack is eating itself from the inside out at the developer layer.

stop idiot, stop!