Jeremy Howard, quoted by @danielmac8 on 2026-06-19, praises Zaiorg’s GLM 5.2 as matching or exceeding Opus 4.8 and GPT 5.5 in quality. He highlights its speed, low cost, concise output, strong long-context handling, and judged responses, noting surprise that an open-weights model performs at this level.
Jeremy Howard (tweet quoted by @daniel_mac8 on 2026-06-19) claims Zai_org's GLM 5.2 is “at least as good as Opus 4.8 and GPT 5.5,” asserting parity with those proprietary models.
Is this true?
Jeremy Howard (@jeremyphoward)
Wow.
@Zai_org GLM 5.2 is a marvel! It is at least as good as Opus 4.8 and GPT 5.5. It's super fast, inexpensive, and not too verbose.
It responds with nuance and judgement, & handles long context VERY well.
I've never experienced an open weights model like this before.
— https://nitter.net/jeremyphoward/status/2067757468189679764#m