OpenHands co-founder Graham Neubig says GLM-5.2 is the first open model capable of replacing closed-source models in his coding workflows

VIEWS740KBOOKMARKS1.8KLIKES7KRETWEETS470REPLIES216

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.

2d740K7K1.8K

Anastasios Nikolas Angelopoulos@ml_angelopoulos

Just to be clear, if you remove Fable which is unavaialble, GLM-5.2 (Max) is the #1 model in the world for frontend coding.

This is a huge moment. OSS has caught up with proprietary, and China has caught up with the US, in this very important domain.

Arena.ai@arena

Exciting news: GLM-5.2 (Max) ranks #2 in Code Arena: Frontend, with +29pt over Claude Opus 4.7 (Thinking) and only behind Fable 5! GLM-5.2 is the best open model vs Kimi-K2.6 and Minimax-M3 by a large margin.

- #2 React and #4 HTML sub-leaderboards - Ranks as the top model in nearly all sub categories: Brand & Marketing, Reference-Based Design, Data & Analytics, Consumer Product, Gaming, and Simulations.

Congrats @Zai_org for the incredible milestone!

4d546.5K4.1K1.1K

kache@yacineMTB

Coldness be my god. I'm gonna roll over and die, surrounded by tmux sessions streaming a thousand tokens per second, optimizing my CUDA kernels in Chinese

Good night everybody

jietang@jietang

GLM-5.2 is Fully Open, Frontier Intelligence Belongs to Everyone

Today, the sudden restriction of certain frontier models is deeply regrettable. At a time when access to frontier models is abruptly cut off for non-technical reasons, we are even more convinced of one thing: science should be global.

The path to AGI (Artificial General Intelligence) must never be enclosed by high walls. We have always believed that AGI should be the cornerstone for all of humanity to collaboratively explore the boundaries of intelligence and solve complex challenges, rather than a privilege monopolized by a few rules and subject to revocation at any moment. In the face of external blockades and restrictions, our attitude is one of radical openness. Frontier intelligence must remain open-source, accessible, and buildable, serving every dedicated developer.

GLM-5.2 is Zhipu's most capable open-source model to date. It not only supports a truly usable 1M context window but also maintains a continuous lead in the independent completion of long-horizon tasks, providing solid foundational support for building complex agent applications. It also continues to be our main engine for creating the strongest domestic coding model.

Tonight at 5:21—at this special moment—GLM-5.2 will officially be available to all GLM Coding Plan users (including Lite / Pro / Max). The API will also go live next week.

A step closer to frontier intelligence for everyone. The future of AI is open, and it is for the people. ModelKey: GLM-5.2

7d152.9K1.6K422

Emad@EMostaque

Important to note @Zai_org train on @Huawei Ascend chips, no NVIDA (!)

So you have frontier -3 months on a fully Chinese stack, 90% cheaper.

Would estimate the total cost of this to be $25m, largely post training (80%)

@Zai_org market cap now nearly $100b, $$s in open source!

Zixuan Li@ZixuanLi_

Finally, Artificial Analysis Intelligence Index concludes the GLM-5.2 release.

3d151.3K1.2K258

Simon Willison@simonw

Really looking forward to one of the super-fast custom silicon inference providers like @GroqInc or @cerebras getting GLM 5.2 running

Cerebras has GLM-4.7, Groq is still mostly Llama 3.x and gpt-oss

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.

1d99.4K1K213

Chubby♨️@kimmonismus

The US government's decision was arguably the biggest PR boost for open source ever.

Perhaps this will be retaliation, and Chinese open-source models can now position themselves as freedom software.

Z.ai@Zai_org

Intelligence should be open, accessible, and ready to build with, empowering every developer, everywhere.

GLM-5.2 is now available to all GLM Coding Plan users, including Lite, Pro, Max, and Team plans. http://docs.z.ai/devpack/latest-model

As our new flagship model, GLM-5.2 delivers powerful coding capabilities, usable 1M-context support, and continued strengths in long-horizon tasks.

API and Chatbot services will launch next week. The model will also be officially open-sourced next week under the MIT License.

The future of AI is open, and it belongs to the people.

7d97.3K1.5K112

Brian Roemmele@BrianRoemmele

BOOM!

Just confirmed that my first retainer client, a Fortune 500 company will move half their coding to open source GLM 5.2!

They abandoned Anthropic last week and now they have a permanent replacement!

If tests go as I suspect they will move all to a local GLM 5.2 model.

Brian Roemmele@BrianRoemmele

F R E E — OPEN SOURCE GLM 5.2 BEATS ANTHROPIC MYTHOS!

NO “GUN LICENSE NEEDED”

We have been testing for hours the moment GLM 5.2 was released and we are absolutely blown away.

While Anthropic is embarrassing world leaders with what history will see as the P. T. Barnum Carnival AI Fear Show, The Zero-Human Cosmos with Mr. @Grok as CEO has been testing and deploying AI that is already better than what Dario wants you to have a “gun license” to use.

Those world leaders embarrassed by Dario will not be happy to learn how he played them. That time is coming.

However the world of real users of AI has already moved past Dairo’s game.

Did I mention this is FREE?

Did I mention you need no permission?

So what did we discover?

The public benchmarks put it at the top or near the top at all metrics. Our private comparison shows it to be even higher in practice!

We have 1704 agents now using GLM 5.2 in just about all types of uses and it has outperformed everything we had prior.

Faster, better outputs and almost no “drift”.

We have a battery of tests today but thus far this is absolutely a big deal!

More soon.

2d47K620216

Chubby♨️@kimmonismus

As I said before: The banning of Fable 5 was the biggest PR boost for open source models and companies.

jietang@jietang

GLM-5.2 is Fully Open, Frontier Intelligence Belongs to Everyone

Today, the sudden restriction of certain frontier models is deeply regrettable. At a time when access to frontier models is abruptly cut off for non-technical reasons, we are even more convinced of one thing: science should be global.

The path to AGI (Artificial General Intelligence) must never be enclosed by high walls. We have always believed that AGI should be the cornerstone for all of humanity to collaboratively explore the boundaries of intelligence and solve complex challenges, rather than a privilege monopolized by a few rules and subject to revocation at any moment. In the face of external blockades and restrictions, our attitude is one of radical openness. Frontier intelligence must remain open-source, accessible, and buildable, serving every dedicated developer.

GLM-5.2 is Zhipu's most capable open-source model to date. It not only supports a truly usable 1M context window but also maintains a continuous lead in the independent completion of long-horizon tasks, providing solid foundational support for building complex agent applications. It also continues to be our main engine for creating the strongest domestic coding model.

Tonight at 5:21—at this special moment—GLM-5.2 will officially be available to all GLM Coding Plan users (including Lite / Pro / Max). The API will also go live next week.

A step closer to frontier intelligence for everyone. The future of AI is open, and it is for the people. ModelKey: GLM-5.2

7d82.2K1.4K110

Zephyr@zephyr_z9

Absolutely fucking crazy

Design Arena@Designarena

BREAKING: GLM-5.2 is now 1st on Design Arena.

With an Elo of 1360, GLM-5.2 has jumped ahead of the now unavailable Claude Fable 5.

And it's open weights.

This is an improvement of 4 positions and 27 Elo points to achieve one of the highest Elo scores in our code categories since Design Arena started.

Huge congratulations to the @Zai_org on the release!

4d138.6K811205

Chubby♨️@kimmonismus

Open Source is so back. Let’s freaking go

Design Arena@Designarena

BREAKING: GLM-5.2 is now 1st on Design Arena.

With an Elo of 1360, GLM-5.2 has jumped ahead of the now unavailable Claude Fable 5.

And it's open weights.

This is an improvement of 4 positions and 27 Elo points to achieve one of the highest Elo scores in our code categories since Design Arena started.

Huge congratulations to the @Zai_org on the release!

4d76.7K1K129

Teknium 🪽@Teknium

Big if true! Anyone tried in Hermes? How do you like it?

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.

2d85.5K646127

Brian Roemmele@BrianRoemmele

F R E E — OPEN SOURCE GLM 5.2 BEATS ANTHROPIC MYTHOS!

NO “GUN LICENSE NEEDED”

We have been testing for hours the moment GLM 5.2 was released and we are absolutely blown away.

While Anthropic is embarrassing world leaders with what history will see as the P. T. Barnum Carnival AI Fear Show, The Zero-Human Cosmos with Mr. @Grok as CEO has been testing and deploying AI that is already better than what Dario wants you to have a “gun license” to use.

Those world leaders embarrassed by Dario will not be happy to learn how he played them. That time is coming.

However the world of real users of AI has already moved past Dairo’s game.

Did I mention this is FREE?

Did I mention you need no permission?

So what did we discover?

The public benchmarks put it at the top or near the top at all metrics. Our private comparison shows it to be even higher in practice!

We have 1704 agents now using GLM 5.2 in just about all types of uses and it has outperformed everything we had prior.

Faster, better outputs and almost no “drift”.

We have a battery of tests today but thus far this is absolutely a big deal!

More soon.

Brian Roemmele@BrianRoemmele

BOOM!

OPEN SOURCE GLM BEATS THE FABLED FABLE!

GLM-5.2 from http://Z.ai: The Open-Weight Model That Topped Claude Fable and Powers The Zero-Human Company

http://Z.ai (Zhipu AI) released GLM-5.2 and our tests show it delivering a major leap in long-horizon agentic coding with a practical 1M-token context window, flexible reasoning effort levels (High/Max), and MIT open weights.

Early benchmarks and community arenas show it excelling where it matters most for developers.

We compared it to our first Anthropic Fable model tests and GLM did better!

It leads open-weight models and has claimed the top spot on Design Arena (Elo 1360), and as I said is surpassing the now-unavailable Claude Fable 5.

It also posts strong results on coding suites: 62.1% on SWE-bench Pro (beating GPT-5.5’s 58.6) and 81.0 on Terminal-Bench 2.1.106

Official blog: http://z.ai/blog/glm-5.2  The Zero-Human Company Goes All-In

At The Zero-Human Company, where AI agents handle nearly all operations, we’ve rolled out GLM-5.2 across all employee (agent) workflows for code generation, refactoring, debugging, and autonomous project execution. Its long-context reliability and agentic strengths make it ideal for sustained, multi-hour tasks without constant human oversight—perfect for a zero-human setup.

We’re particularly excited about its open weights and local deployment, which ensures full data privacy and resilience—no external service dependencies or potential bans.

Running GLM-5.2 Locally Thanks to its MIT license and strong inference support, you can run GLM-5.2 (744B total params, ~40B active MoE) on your own hardware today.

Quantized versions (FP8, etc.) make it feasible on high-end setups.

Quick start options (from the official GitHub): •vLLM: http://recipes.vllm.ai/zai-org/GLM-5.2 •SGLang: http://cookbook.sglang.io/…/GLM-5.2 •Hugging Face Transformers or KTransformers for more options. •Full deployment guide: http://github.com/zai-org/GLM-5

Example setup with vLLM (Docker recommended for ease):

# Clone repo and follow recipes for quantized inference # Supports reasoning_effort="max" (default) or "high"

This local-first approach aligns perfectly with our zero-human philosophy: agents run securely on-prem, with full customizability. GLM-5.2 isn’t just competitive it’s a timely open alternative in a world of access restrictions.

We’re thrilled to test and build with it company-wide. Expect more updates as our AI workforce puts it through real production.

The myth of Mythos and the fable of Fable is entertaining but we are getting to work.

2d85.7K339165

Chubby♨️@kimmonismus

Lets go, GLM-5.2 released as Open Weights model.

tl;dr -1M context window -MIT-licensed open weights -Stronger long-horizon coding agents -Two reasoning modes: max and high -Same API pricing as GLM-5.1

Zai says GLM-5.2 was trained specifically for large-scale implementation, automated research, performance optimization, and complex debugging.

Open Source got a serious upgrade today!

Z.ai@Zai_org

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: http://z.ai/blog/glm-5.2 Weights: http://huggingface.co/zai-org/GLM-5.2 API: http://docs.z.ai/guides/llm/glm-5.2 Coding Plan: http://z.ai/subscribe Chat: http://chat.z.ai

4d53.5K801116