Zhipu AI Releases GLM-5.2 Open Weights: 753B MoE with 1M-Token Context under MIT License
Zhipu AI / Z.ai
Z.ai (formerly Zhipu AI) published full MIT-licensed weights for GLM-5.2 on HuggingFace on June 17, 2026. The model is a 753B-parameter mixture-of-experts architecture with a 1 million-token context window, optimized for long-horizon coding and agentic tasks. No regional restrictions apply. On Code Arena it ranks second globally among open models, trailing only closed-source leaders.
Why it matters
GLM-5.2 is the strongest open-weight model for long-horizon coding at time of release, matching several closed-source frontier models on coding benchmarks. MIT license with no regional restrictions is a rare combination for a large-scale Chinese-lab model.
Importance: 4/5
Frontier-class open-weights release from a major Chinese lab: SOTA coding, 1M-token context, MIT license — all three together are unprecedented at this scale.