GLM-5.1 — Open-Weight Frontier from the World's First Publicly Listed LLM Company

GLM-5.1 (April 7, 2026) is a 754B-parameter MoE from Z.ai (Zhipu AI) — the first open-weight model ever to top SWE-Bench Pro, capable of 8-hour autonomous execution, and released under the MIT license at a fraction of closed-API pricing.