GLM-5.2 becomes the fastest growing AI model of 2026 on a free MIT license
GLM-5.2, released by Chinese lab Z.ai on June 16, 2026 under a free MIT license, saw the fastest adoption of any model tracked by Vercel this year: daily token volume grew about 27x and customer count about 80x in its first full week. On SWE-bench Pro, a benchmark of real software engineering tasks, it scores 62.1 percent, ahead of GPT-5.5 at 58.6 percent, while costing a fraction of flagship US models.