GLM-5.2 is probably the most powerful text-only open weights LLM

230 · · June 18, 2026, 12:37 a.m.
Summary
Z.ai recently released GLM-5.2, a new text-only open weights language model boasting 753 billion parameters and a million-token context window. It ranks as the leading open weights model on the Artificial Analysis Intelligence Index, despite being token-hungry. The author shares personal experiences testing the model for generating SVG graphics, noting impressive results and some disappointments compared to its predecessor, GLM-5.1.