# GLM-5.2

> **TL;DR.** GLM-5.

- **Category:** AI / LLMs / Open Source
- **Stage:** nascent
- **Age:** 5 days
- **Origin date:** 2026-06-13
- **First detected:** 2026-06-17
- **Canonical URL:** https://earlyterms.com/term/glm-5-2
- **Sources:** 7 primary URLs

## Definition

GLM-5.2 is Z.ai's (Zhipu AI) 744-billion-parameter open-weight Mixture-of-Experts model engineered for long-horizon coding and autonomous engineering tasks, released under the MIT license. Its IndexShare architecture reduces per-token compute by 2.9x at a one-million-token context, making the full window practical rather than nominal.

Z.ai launched GLM-5.2 on [June 13, 2026](https://z.ai/blog/glm-5.2) for GLM Coding Plan subscribers, then released open weights on HuggingFace on June 16-17 — arriving 48 hours after US export controls forced Anthropic to suspend Claude Fable 5 and Mythos 5 for international users. On the Artificial Analysis Intelligence Index v4.1, GLM-5.2 scores 51, leading all open-weight models and trailing only Claude Fable 5 (60), Claude Opus 4.8 (56), and GPT-5.5 (55).

## Analogy

A long-haul truck on open-source diesel: less peak torque than a rocket, but no one can ground the fleet.

## Why it's emerging now

GLM-5.2 launched June 13, 2026, one day after US export controls revoked international access to Anthropic's top models. As the highest-scoring open-weight model on the Artificial Analysis Intelligence Index (score 51), it became the strongest freely deployable coding alternative for the estimated 70% of developers outside the United States who lost Fable 5 access overnight.

## Related terms

- *parent:* GLM-5.1
- *related:* GLM-4.7
- *competitor:* Claude Fable 5
- *competitor:* Claude Opus 4.8
- *competitor:* GPT-5.5
- *competitor:* DeepSeek V4 Pro
- *competitor:* MiniMax-M3
- *parent:* Agentic Coding
- *related:* Coding Agents
- *competitor:* Kimi K2.6
- *child:* IndexShare

## Sources

1. [Z.ai official blog — GLM-5.2: Built for Long-Horizon Tasks](https://z.ai/blog/glm-5.2)
2. [HuggingFace blog — GLM-5.2 technical overview](https://huggingface.co/blog/zai-org/glm-52-blog)
3. [HuggingFace model card — zai-org/GLM-5.2 (MIT license, 753B params)](https://huggingface.co/zai-org/GLM-5.2)
4. [Artificial Analysis — GLM-5.2 tops Intelligence Index v4.1 with score of 51](https://artificialanalysis.ai/articles/glm-5-2-is-the-new-leading-open-weights-model-on-the-artificial-analysis-intelligence-index)
5. [Simon Willison — GLM-5.2 is probably the most powerful text-only open weights LLM](https://simonwillison.net/2026/Jun/17/glm-52/)
6. [The Decoder — GLM-5.2 closes in on closed-source leaders in coding marathons](https://the-decoder.com/zhipu-ais-glm-5-2-closes-in-on-closed-source-leaders-in-coding-marathons/)
7. [South China Morning Post — Zhipu AI stock rockets on GLM-5.2 open-source release](https://www.scmp.com/tech/tech-trends/article/3357115/zhipu-ais-stock-rockets-after-chinese-firm-makes-glm-52-open-source)

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_Generated by EarlyTerms · https://earlyterms.com/term/glm-5-2_