Mostly depends on which features are most important for you. I'm a SWE, so using their Assistant for Web RAG nearly exclusively for work-related stuff and for most of my personal queries. I'm rarely using multi-modal content, mostly sticking to text. They support many providers and new notable models are typically rolled out only a few days after release which is always great to test out. I have a standalone subscription for coding agent LLM. If above aligns - might be a good choice.
I do a lot of help with spreadsheets and some ongoing threads in ChatGPT.
I’m an Assistant Principal so use it to help me get better with spreadsheets, churn through complex formulas, and some other miscellaneous tasks for feedback and assistance. Definitely use a lot of screenshots of things to also help consume info in there.
I think I might be stuck with both for a while as I’m not sure Kagi can quite fill this gap yet.