Zhipu's official news (zhipuai.cn/zh/news/148, 2026-01-19) states GLM-4.7-Flash replaces GLM-4.5-Flash free and GLM-4.5-Flash retires 2026-01-30 with requests auto-routed to GLM-4.7-Flash; BigModel's free-model price table now lists GLM-4.7-Flash and no longer 4.5-Flash; lane ended at 2026-01-30 → end date Jan 30