Comment by port11

From my experience (~10M tokens on each): Opus remains better at more or less everything, and seems to hold its own better in large context work. It’s also more thorough. And usually can fix the weirdest of bugs, GLM is a bit hit and miss.

That said, GLM is worlds cheaper and a great little planner if you do a couple of rounds covering edge cases or things it might have forgotten. I can’t cache it via OpenCode Go, so I plan with GLM after gathering context cheaply, and then pass the plan to Gwen. That pairs well and shows the beauty of a multi-provider harness.

I should also add that I run GLM in Pi with a lot of cool little things such as hashline edits, some plugins for general smartness, etc. Opus runs in CC with the native tooling (except for Semble and Serena).