This is why you need to have your own set of personal benchmarks. I have a few short stories that I have models continue (ones I wrote ages ago in my youth) or refactor. Some models are fantastic at writing but miss key details or enmesh them (Claude). Some are terrible writers at higher reasoning (o3). Some are decent writers but tend to provide very short outputs (gpt-4o). For my personal benchmarks Gemini 2.5 Pro has always generated the most compelling writing that _also_ sticks to the world/script -- and sometimes surprises me by having characters react in ways that I hadn't considered but are consistent with their "worldview" as presented by the context (usually a world guide).

I find coding to be harder to benchmark because there are so many ways to write the same solution. A "correct" solution may be terrible in another context due to loss of speed, security, etc.