Z.AI Launches GLM-5.1: Open-Weight 754B Agentic Model with State-of-the-Art SWE-Bench Pro Performance

Summary

Z.AI has released GLM-5.1, a 754-billion parameter open-weight model designed specifically for agentic use cases. The model reportedly achieves state-of-the-art results on SWE-Bench Pro, a benchmark focused on real-world software engineering tasks, and is capable of sustaining autonomous execution for up to 8 hours. The open-weight release at this scale represents a significant milestone in making large agentic models accessible outside of closed API providers. The 8-hour autonomous execution c