AI Agents Join The 8 Hour Work Day Club With New GLM 5.1

Z.ai has released GLM-5.1, a 754-billion-parameter Mixture-of-Experts AI model, under an MIT open-source license, signifying a strategic shift towards long-duration autonomous task execution for enterprises. This model is engineered to operate on a single task for up to eight hours, capable of executing thousands of steps and tool calls, far exceeding previous agent-based systems. GLM-5.1 demonstrates superior performance, achieving 21,500 queries per second in database optimization and outperforming models like GPT-5.4 and Claude Opus 4.6 in key benchmarks such as SWE-Bench Pro and AIME 2026. Positioned as a developer tool, it's available via subscription plans and API usage, making it a significant advancement for commercial AI applications requiring sustained, goal-aligned operations.