Claude Opus 4.1 vs Z.AI: GLM 4.5

Compare Claude Opus 4.1 by Anthropic against Z.AI: GLM 4.5 by Zhipu AI, in 6 community votes, z.ai: glm 4.5 wins 67% of head-to-head duels, context windows of 200K vs 128K, tested across 24 shared challenges. Updated February 2026.

In 6 community votes, Z.AI: GLM 4.5 wins 67% of head-to-head duels. Z.AI: GLM 4.5 leads in Image Generation. Based on blind community voting from the RIVAL open dataset of 6+ human preference judgments for this pair.