I recently had ChatGPT refactor an entire mathematical graph rendering logic that I wrote in vanilla js, and had it rewrite it as GLSL. It took about an hour overall (required a few prompts). That is world-class level in my opinion.
I'm currently trying to get Claude Sonnet 4.5 to produce a graph rendering algorithm, and while it's producing results, they're not the right results. I should probably do this myself and let the AI handle just the boilerplate code.
If I tell people that I can write programming code at world-class level and in some of my reviews I make junior mistakes, I make out functions or dependencies that do not exist or I am unable to learn from my mistakes, I would be put on PIP immediately. And after a while, fired. This is the standard LLMs should be held up against when you use the word "world class".