Z.ai has released GLM-5.2, a text-only open weights model with 753B total and 40B active parameters, under an MIT license. Independent benchmarks rank it as the leading open weights model, though it is noted to be more token-hungry than its competitors.
Z.ai has released GLM-5.2, a text-only open weights model with 753B total parameters and 40B active parameters, under an MIT license. The model features an expanded context window of 1 million tokens, up from 200,000 in the previous GLM-5.1 version.
Independent benchmark Artificial Analysis ranked GLM-5.2 as the leading model on its Intelligence Index for open weights models. It also achieved 2nd place on the Code Arena WebDev leaderboard for front-end web development tasks, demonstrating strong performance without image input. However, analysis shows it consumes significantly more output tokens per task compared to competing models.
The release provides the open-source ecosystem with a powerful new option for text processing tasks. While token efficiency remains an area for improvement, the combination of high performance and permissive licensing intensifies competition in the open-weight LLM market.