GLM-5.1 Complete Guide — The Free Model That Rivals Claude (2026)

Z.ai (formerly Zhipu AI) just released GLM-5.1, a 754-billion-parameter open-source model that scored #1 on SWE-Bench Pro — beating GPT-5.4, Claude Opus 4.6, and Gemini 3.1 Pro. It's MIT licensed, trained entirely on Huawei chips, and designed to cod...