1. GPT4 is learning from the same spartan docs as you, likely

2. GPT4's training data likely doesn't include significant Zig use, since large parts of its training data cut off a few years ago. I use Rust and it doesn't know about any recently added Rust features, either.

This has interesting implications because it means people will gravitate towards languages/frameworks/libraries that GPT knows well, which means even less training data will be generated for the new stuff. This is a form of value lock-in.