alt Hacker NewsHN thread from 2 days ago:
https://news.ycombinator.com/item?id=48567759
Commenters there were saying GLM 5.2 was roughly equivalent to Opus 4.8 in coding prowess, based on personal experience of the people commenting. Opus 4.8 came out on May 28 this year (so more like 3 weeks ago), GLM 5.2 came out 2 days ago.
I haven't tried this specific model, but you can understand that a lot of HN testimonials are bound to swing extremely pro open source. I certainly hope they are as good. But I have personally tried a lot of models that are supposedly as good as the frontier ones and have found them lacking.
After a while, you do start to start to skip a couple rounds of open source models until there's a notable release. That, and the resources needed to run them are increasingly bought up by the owners of frontier models