The codebase and the topic you're working on are huge variables.

I don't use LLMs to write code (other than simple refactors and throwaway stuff) but I do use them heavily to crawl through big codebases and identify which files and functions I need to understand.

Some of the codebases I explore will burn through tokens at a rapid rate because there is so much complex code to get through. If I use the $20 Claude plan and Opus I can go through my entire 5-hour allocation in a single prompt exploring the codebase some times, and it's justified.

Other times I'm working on simple topics, even in a large codebase, and it will sip tokens because it only needs to walk a couple files to get to what it needs to answer my questions.