Z.ai: GLM 5 vs OpenAI o3

Compare Z.ai: GLM 5 by Zhipu AI against OpenAI o3 by OpenAI, tested across 50 shared challenges. Updated March 2026.

Which is better, Z.ai: GLM 5 or OpenAI o3?

Z.ai: GLM 5 and OpenAI o3 are both competitive models. Z.ai: GLM 5 costs $0.8/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.

Key Differences Between Z.ai: GLM 5 and OpenAI o3

Z.ai: GLM 5 is made by zhipu while OpenAI o3 is from openai. On pricing, Z.ai: GLM 5 costs $0.8/M input tokens vs $10/M for OpenAI o3.

Our Verdict
Z.ai: GLM 5
Z.ai: GLM 5
OpenAI o3
OpenAI o3

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Z.ai: GLM 5 is 16x cheaper per token — worth considering if cost matters.

Too close to call
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