Does Deepseek-v3 not support codebase in Ask mode?

I tried to use Deepseek-v3 in Ask mode to illustrate some problems with my codebase. But I found that its answers were all virtual hypothetical content and asked me for detailed code files, which made me doubt whether it could see my codebase. So I copied the same problem description and changed the model, and finally I found that claude can recognize the codebase, while deepseek-v3 cannot. This means that it requires you to manually provide files as context, which is stupid. I clearly remember that when cursor updated the version and removed the codebase option, the reason given was that Ask mode already includes codebase. This is frustrating.Who can tell me why?

hello?