Zai was gracious enough to give me a key to test out GLM 5.2. I used it on a few simple tasks and quickly realized this model is on another level.
I committed to using GLM 5.2 solely for the weekend and yesterday on everything from simple data analysis, random queries, side projects, and real work, and I can honestly say this is the first open model that I could comfortably replace Opus 4.8/GPT 5.5 with. It’s THAT good. When I say everything, I mean everything. I never needed to fallback to GPT 5.5 or Opus 4.8. This really blew my mind.
I was unable to find any task where I knew GPT 5.5 or Opus 4.8 could solve, but GLM 5.2 could not, and I actually found a few cases where GLM 5.2 was better. I am not trying to overhype anything here. It's just my actual experience with this model. It was of course only 3ish days of usage, maybe cracks would form in time, but the perf is staggering imo.
I see it's an "inferior" model on the benchmarks even Zai has shared, but I am not so sure and I think this is the first time I've experienced that with an open model. I am not saying it's necessarily better, but I believe it's a replacement that you could run on-prem, which is crazy to me.
It was to the point where I was double triple quadruple checking that I wasn't accidentally running Opus or GPT. I ran thru both Hermes and my own custom coding agent harness with extremely great success.
I cannot believe this is only a 754B model that's also an open MIT licensed model. Do not sleep on this one, and definitely try it out.
Get it locally if you can!
Can I find a way to run it locally? That’s a different question, but I will be trying to get it done because this model is epic.
Introducing GLM-5.2: Frontier Intelligence, Open Weights
- Significant improvements in coding and agentic tasks
- Strong long-horizon capabilities with a 1M context window
- Two levels of reasoning effort: GLM-5.2 (max) pushes the limits, while GLM-5.2 (high) strikes a strong balance between performance and token efficiency
- MIT-licensed open weights
- Same API pricing as GLM-5.1
Tech Blog:
z.ai/blog/glm-5.2
Weights:
huggingface.co/zai-org/GLM-5…
API:
docs.z.ai/guides/llm/glm-5.2
Coding Plan:
z.ai/subscribe
Chat:
chat.z.ai