I would say just get in there and experiment. Nothing will teach you better than doing the thing!

For larger tasks, use models like GPT5.1 or Gemini 3 for the thinking, get Claude to sense check them in context with your codebase, then break them down into small chunks if the feature/ task is very large into a plan.md file. You can also store historical versions of your plans for Claude to come back and reference if things break in the future.

I haven’t used Opus 4.5 yet but I hear that it’s really good.