It got 46.2 on DeepSWE in Z.ai's own run[1]. That would put it between Opus 4.7 xhigh and Opus 4.8 medium.
I'm not accusing anyone specifically, but I've noticed Chinese bots swamping certain YouTube channels that, for example, cover US defense industry news. They'll downplay any and all technical advances, play up China's dominance, US cowardice, etc. All very transparent. I suspect some of the online conversation about open Chinese models is driven by that. How often do you see people talking about Mistral or Trinity? Never. Because they don't play that game.
GLM definitely isn't opus level yet but it's for sure good. I think it lacks some knowledge (when coding) that the frontier models possess, which is expected given that the model is probably quite small when compared to the frontier.
But people don't say much about Mistral, probably because they are nowhere as good.. And they don't have large population behind them to actually use them.