I don't think this shows at all that ChatGPT can access the internet? It looks like ChatGPT was given a URL with a title and hallucinated a blog post based on that title. The author then brushes it off as 'written in a different style', when it just looks like a totally different article overall (or maybe it's testament to the fact that too many Medium articles are low quality and indistinguishable from the output of a LLM!)

If anything, this blog post is a perfect example about how people can put in whatever they want as an input and take the output as truth, without any rigorous approach about what would count as a true fact about the model.