AI joins the 8-hour work day as GLM ships 5.1 open source LLM, beating Opus 4.6 and GPT 5.4 on SWE-Bench Pro

GLM-5.1 is released on Hugging Face under a permissive MIT License for download, customization, and commercial use.

The model is a 754-billion-parameter Mixture-of-Experts (MoE) architecture.

GLM-5.1 supports a 202,752-token context window.

It is designed to work autonomously for up to eight hours on a single task and to maintain goal alignment across extended traces spanning thousands of tool calls.

Z.ai (also known as Zhupai AI) was listed on the Hong Kong Stock Exchange in early 2026 with a market capitalization of $52.83 billion.