Paid Claude but still frequently getting "it hit the maximum length allowed at this time"

I am working on a relatively large codebase. I am already paying the $20 for the paid version and using the "projects" feature but still hitting the following error. Is there any way to be able to maintain a large context window? how do you all maintain a large context window for coding?

https://preview.redd.it/u36l6scnmo9e1.png?width=1062&format=png&auto=webp&s=e0f4db2351ec65b1dea7c40f66cc4209d555c957