Z.ai’s GLM-5.3 has been evaluated by Artificial Analysis at 60 on its Intelligence Index, the independent evaluator reported on August 18, 2026, placing the Chinese lab’s newest reasoning model level with Moonshot AI’s Kimi K3 and three points behind Anthropic’s Claude Opus 5, the current leader at 63. The score covers GLM-5.3 running at its maximum reasoning effort, the setting Z.ai recommends for coding work. At 60, it sits well above the 35 median of the 181 models in its comparison class…