Gemini 2.5 Pro might be one of the best for coding but for creative tasks like writing and sharing ideas, I vastly prefer GPT 4o and GPT 4.5 to an even larger extent.
Gemini 2.5 Pro's prose isn't quite as tight as GPT4.5s, but being able to have long form writing where your entire manuscript is in the context, along with all your source/background material, and it all gets used _well_ is pretty stellar. That lets Gemini update scenes in a really thoughtful, intelligent way, and frankly it's a better beta reader than ~85% of the people I've hired on Fiverr.