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Z.ai announced GLM-5.2 (posted 2026-06-16), a frontier LLM with MIT-licensed open…

2026-06-16 · 18:19 UTC ·@AndrewCurran_ ·0 min read

Brief

Z.ai's GLM-5.2, announced 2026-06-16, is an open-weights LLM released under the MIT license with weights on Hugging Face. It targets stronger coding and agentic performance, supports a 1M-token context window, offers two reasoning-effort tiers (max and high), and uses the same API pricing as GLM-5.1.

Why it matters

Z.ai announced GLM-5.2 (posted 2026-06-16), a frontier LLM with MIT-licensed open weights available on Hugging Face.

Key details

  • GLM-5.2 offers a 1,000,000-token context window and two reasoning modes—GLM-5.2 (max) for peak capability and GLM-5.2 (high) for token-efficient performance.
  • Z.ai claims significant improvements in coding and agentic tasks and says API pricing remains the same as GLM-5.1; tech blog, weights, API docs, and chat links provided.
Source evidence

Extremely powerful and MIT open-source. Mutuals who had early access are giving it great reviews.

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: 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

— https://nitter.net/Zai_org/status/2066938937344495629#m