Anthropic said they vibe-coded a C compiler that could compile the Linux kernel. That's what they said. No-one forced them to say that. They could have picked another code base.

It turns out that isn't true in all instances, as this article demonstrates. I'm not nearly expert enough to be able to decide if that error was simple, stupid, irrelevant, or whatever. I can make a call on whether it successfully compiled the Linux kernel: it did not.