Claude is better for technical stuff according to my experience, chatgpt is really useful for me as a replacement for a search engine
I also like the www.perplexity.ai/ because it gives you the sources for the answers it provides.
It also offers a quite nice organization of your threaded questions into a sections.
And between ChatGPT and Claude, I use Claude for a help when reading and interpreting scientific papers, and ChatGPT for a more human like conversation like when checking the spelling and grammar.
I’m not saying that’s the best way to use them, but I had the best experience using them that way, at least so far.