Z.ai's GLM-5.3 with max reasoning scores 60 on the Artificial Analysis Intelligence Index, on par with Kimi K3 but below Opus 5 at 63 and Fable 5 at 62 (@artificialanlys)

Z.ai’s GLM-5.3 scores a maximum reasoning score of 60 on the Artificial Analysis Intelligence Index, matching Kimi K3. It falls short of Opus 5 (63) and Fable 5 (62) but surpasses its predecessor GLM-5.2. When its weights are released, GLM-5.3 will become the leading open-weights model.