GLM-5.2 cost a fraction as much. Opus finished in half the time and shipped a cleaner game

This implies Opus was potentially much (?) better value.

GLM cost a quarter but Opus was twice as fast. So we are already at GLM actually costing half when you compare on time, without even considering the extra effort and time it would take to get Opus-par results.

It's good to have cheaper options and very impressive to see the Chinese continue to set open standards in this field, but the article is maybe a little over-generous.