GLM-5.1: Open-Weight 754B MoE Model Hits #1 on SWE-Bench Pro at 58.4%, Sustains 8-Hour Autonomous Execution — MIT Licensed

r/LocalLLaMA / HuggingFace·high signal

Z.AI (formerly Zhipu AI) released GLM-5.1, a 754-billion parameter MoE model (40B active) under MIT license. It achieves state-of-the-art 58.4% on SWE-Bench Pro, beating GPT-5.4, Claude Opus 4.6, and Gemini 3.1 Pro. The standout capability is 8-hour autonomous task execution — maintaining goal alignment over 600+ iterations and thousands of tool calls. Additional benchmarks: 95.3 AIME 2026, 86.2 GPQA-Diamond, 68.7 CyberGym, 200K context window, 131K max output. Available on HuggingFace; vLLM image already tagged. Reddit: 604 upvotes and 187 comments on r/LocalLLaMA, with a second post (63 upvotes) noting vLLM readiness within 20 minutes of release.