Z.AI: GLM 4.5 vs GPT-4o (Omni)

Compare Z.AI: GLM 4.5 by Zhipu AI against GPT-4o (Omni) by OpenAI, in 1 community votes, z.ai: glm 4.5 wins 100% of head-to-head duels, context windows of 128K vs 128K, tested across 43 shared challenges. Updated March 2026.

Which is better, Z.AI: GLM 4.5 or GPT-4o (Omni)?

Z.AI: GLM 4.5 is the better choice overall, winning 100% of 1 blind community votes on Rival. Z.AI: GLM 4.5 costs $0.6/M input tokens vs $2.5/M for GPT-4o (Omni). Context windows: 128K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between Z.AI: GLM 4.5 and GPT-4o (Omni)

Z.AI: GLM 4.5 is made by zhipu while GPT-4o (Omni) is from openai. Z.AI: GLM 4.5 has a 128K token context window compared to GPT-4o (Omni)'s 128K. On pricing, Z.AI: GLM 4.5 costs $0.6/M input tokens vs $2.5/M for GPT-4o (Omni). In community voting, In 1 community votes, Z.AI: GLM 4.5 wins 100% of head-to-head duels.

In 1 community votes, Z.AI: GLM 4.5 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 1+ human preference judgments for this pair.

Our Verdict
Z.AI: GLM 4.5
Z.AI: GLM 4.5Winner
GPT-4o (Omni)
GPT-4o (Omni)Runner-up

Pick Z.AI: GLM 4.5. In 1 blind votes, Z.AI: GLM 4.5 wins 100% of the time. That's not luck.

Z.AI: GLM 4.5 is 4.5x cheaper per token — worth considering if cost matters.

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