That's an interesting perspective to me since I've gone the opposite way. Claude Sonnet 3.5 beat ChatGPT in every test that mattered to me. Perplexity is a fantastic service when you want gather information or do research a topic, much better than any off-the-shelf LLM imo. I'm not overly surprised that some people have your perspective, since OpenAI has done a great job dominating mind share, but I think if you look at some of the other options you'll find there's a lot of great tools and some of them are even better than ChatGPT. The one caveat I have is that I don't do image generation and it's not very important to me so OpenAI may have the best option there, I don't know.