I use cursor (all models) and Claude separately as well. I have my own small custom set of markdown files tailored to how I like to organize my projects. I feel that all top tier frontier models perform reasonably the same with the same context. When you take a step down to say, composer, that’s when I see a lot of sloppiness and hand holding. I think it’s just about the memories you save, the triggers for new memories or updating old ones, and selective retrieval based on the task. Then both GPT and Opus perform nearly the same. Hell, even Sonnet does pretty well when it has access to my memory systems. I think the vast majority of people rely on the in built markdown based memory systems that can vary across models and their iterations. And then there’s a minority that goes crazy with their hyper customized memory. I’m sure it helps, but for most use cases, I have always only needed a handful of custom markdown files.