Z.ai

The lab behind the GLM models, and the Z.ai assistantReference profile

About Z.ai

Z.ai (Zhipu) is the AI lab behind the GLM model family. Its Z.ai assistant, powered by GLM models, builds websites, writes code, handles long-horizon tasks and answers questions.

Many GLM models are released with open weights on Hugging Face (zai-org), and ZCode is its official agent harness for GLM.

Why it matters

Z.ai (Zhipu) builds the GLM models, many of them released as open weights.

Updates & reading

Long readEditorial

A Tougher AI Leaderboard Leaves More Than Open-Weight Models Behind

Artificial Analysis says its Intelligence Index v5 widened the gap between open-weight models and the leader to 12 points from 3, and critics say a test that is 60% private can't be checked. The firm's own per-test scores show that many closed models fell alongside open-weight ones on the new tests, and that more than half of DeepSeek's deficit to the top models comes from public benchmarks anyone can rerun.