Z.ai has released GLM-5.2, a powerful text-only open weights language model with 753 billion parameters and a 1 million token context window, which is now ranked as the leading model on the Artificial Analysis Intelligence Index. Although it excels in generating complex outputs, it has been noted to be more token-hungry compared to its predecessors and other leading models.
The release of GLM-5.2 as an open weights model with a 1 million token context window presents a significant opportunity for leveraging large-scale text-only LLMs in AI coding workflows. Its competitive pricing compared to GPT-5.5 and Claude Opus 4.5-4.8 could make it an attractive option for tasks requiring extensive context handling, despite being token-hungry. Exploring its capabilities via platforms like OpenRouter could yield valuable insights for enhancing AI productivity and agentic coding processes.