I wrote up a guide on my blog post so that folks can get up and running with GLM 5.2. This is probably the best way to do it inside of Droid. That way you get the Million Token Context Window and a really good harness to drive this. Another advantage of using Droid is that you can bring your own key, and in this case I explained how to do that.
What's nice about my blog posts is you can also point your AI agents to set them up. I include setups for doing this inside of Claude Code, Codex, and Factory AI, but you can point it at other harnesses as well.