Intelligence is maybe a few months behind. But cost sadly is further behind. GLM-5.2 has a deceptively high cost during day-to-day usage for e.g. coding because 1) it has to think a ton more than GPT-5.5/Opus-4.8 to get to competitive results; 2) many providers are still figuring out caching; and 3) API pricing for Codex/Claude can be as high as 40x more than subscription pricing, which distorts the market.