Where to switch for February?

Hello! So, in light of the retirement of the GPT4 line, I want to ask where I could switch to?

Because without GPT4o, I don't see the ChatGPT Plus subscription worth the money anymore—so I'll be cancelling.

I use AI mostly for creative ideation, interview practice (related to my job), and some fanfiction writing (with NSFW stuff sometimes).

Between Claude, Grok, and Gemini, or other AIs, where should I switch subscriptions to?

I only have budget for ONE subscription per month so I want to transfer to something that would be VERY worth my money.