@kevinrothrock depends on your use case and a lot of this is vibes-based.
#Claude is great for coding, and allows you organise your work in “projects” which can have their own custom instructions and documents (similar to #notebookLM minus the podcasts). No web search capability yet.
#ChatGPT’s advanced voice mode is great for language learning, or if you often don’t have your hands free, for example when pushing a stroller. The o1 model is quite useful if you want to brainstorm on a complex issue, you can get similar quality output from Claude, but you have to do several “tree of thought” style prompts with to refine the result.
Using them through third parties like #perplexity or #cursorAI is cheaper, but somehow the results I get are slightly worse. (Likely the API uses different system prompts.)