GLM-5.2

GLM-5.2 is Z AI's open-source coding and long-horizon task model released in June 2026, notable for a claimed 1M-token context window, MIT license, and the Indexshare Architecture sparse-attention optimization.

Key facts

  • Publisher: Z AI [src-095, src-096]
  • Release signal: 2026-06-13 announcement on OpenLM.ai, with official Hugging Face repository created shortly after [src-095, src-096]
  • License: MIT, according to the OpenLM announcement and Hugging Face model metadata [src-095, src-096]
  • Context claim: Z.ai says the model supports a solid 1M-token context for long-horizon work [src-095, src-096]
  • Architecture claim: Indexshare Architecture reuses the same indexer across every four sparse attention layers, reducing per-token FLOPs by 2.9x at 1M context [src-095, src-096]
  • Operational relevance: The model should be watched as a possible open-model option for long-context coding agents, especially where cost, privacy, and local control matter [src-095, src-096].
  • Analyst update: Zvi Mowshowitz argues GLM-5.2 is likely the strongest open model at the time of writing, while still behind the absolute frontier and subject to practical gaps around missing capabilities, generalization, and use-case fit [src-142].

Related entities

Related concepts

Source references

  • [src-095] Z.ai – "GLM-5.2 | OpenLM.ai" (2026-06-13)
  • [src-096] Z.ai / Hugging Face – "zai-org/GLM-5.2" (2026-06-16)
  • [src-142] Zvi Mowshowitz – "GLM-5.2 Is The New Best Open Model" (2026-06-22)

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From 500 indexed pages and articles.

  1. Wiki concept Z.ai The AI lab and publisher behind Glm 52, represented in this wiki by the GLM-5.2 OpenLM announcement and official Hugging Face model repository Related by glm
  2. Wiki concept IndexShare Architecture IndexShare is Z AI's sparse-attention architecture claim for Glm 52, described as reusing the same indexer across every four sparse attention layers to reduce Related by glm
  3. Wiki concept Zvi Mowshowitz An AI analyst and writer represented here by his GLM-5.2 analysis on Don't Worry About the Vase [src-142]. Related by glm