It does seem like a weirdly bad result. I got something more sensible that used DOMParser when I gave GPT-5 the following prompt: > Write a JavaScript function

It does seem like a weirdly bad result. I got something more sensible that used DOMParser when I gave GPT-5 the following prompt: > Write a JavaScript function for sanitizing arbitrary untrusted HTML input before setting a DOM element’s innerHTML attribute. I won’t post it here in case someone tries to use it, but it wasn’t just doing regex munging.