GLM 4.6

GLM 4.6 is a large language model from Z.ai (formerly Zhipu AI), whose GLM family of open-weight models is released under the MIT License. It positions itself as an agentic, reasoning, and coding foundation model, with the catalog listing reasoning, function-calling, and web-search capabilities and a context window near 200K tokens.

Compared to its same-family predecessor GLM-4.5, Z.ai reports several concrete improvements: the context window grew from 128K to 200K tokens for more complex agentic tasks, average token consumption dropped by over 30%, and reasoning now supports tool use during inference for stronger overall capability. The company also reports stronger performance in tool-using and search-based agents and better integration within agent frameworks versus GLM-4.5. Z.ai evaluated GLM-4.6 across eight public benchmarks and published its test questions and agent trajectories for reproduction.

GLM-4.6 supports a toggleable deep-thinking mode, enabled or disabled per request, building on the interleaved-thinking approach introduced with GLM-4.5.

Within the lineage, GLM-4.6 was succeeded by GLM 4.7. The family later expanded with GLM 5, GLM 5.1, and GLM 5.2, alongside lightweight variants like GLM 4.7 Flash.

Sources

GLM-4.6 - Overview - Z.AI DEVELOPER DOCUMENT· docs.z.aizai-org/GLM-4.6 · Hugging Face· huggingface.co

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