I use https://pi.dev/ which works fine out of the box but is fairly minimal and intended to be customized. There are many extensions.

OpenCode or oh-my-pi might make more sense if you just want a batteries-included agent. You can also make Claude Code work with other models without too much work, but I think that's asking for headaches.

Is there any subscription of any kind for Qwen? Or via Pi.dev needs to be used with API credits?

I used claude with GLM and it's easy to set up, just hard to find the documentation. No headaches really, unless you want to use it against multiple different APIs.