[CamperBob2]

So much depends on the thinking effort, it's almost meaningless to compare these models without specifying it. GLM 5.2 needs to run with max thinking effort to be competitive with the leading-edge models from OpenAI and Anthropic. That slows it down quite a bit in my experience. Meanwhile, those models have thinking-effort knobs of their own that make a big difference, especially in GPT 5.5's case.

I have been messing with an early NV4FP quant of GLM 5.2 and so far, that model in its Max setting outperforms GPT 5.5 on its default setting. But GPT 5.5 still pulls ahead once I crank up its own reasoning effort. I imagine the same is true of Opus 4.x but haven't pitted them against each other yet.