GLM 5.2 vs o3
Z.ai's frontier reasoning model for long-context agents and software engineering.
OpenAI's most powerful reasoning model — top across math, coding, and science.
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Frequently Asked Questions: GLM 5.2 vs o3▼
Which is better, GLM 5.2 or o3?
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Based on the Capability Index, GLM 5.2 scores higher (83.4 vs 79.2). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.
Which is cheaper, GLM 5.2 or o3?
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GLM 5.2 has a lower blended cost. GLM 5.2: $1.40 input / $4.40 output. o3: $2.00 input / $8.00 output.
Which has a larger context window, GLM 5.2 or o3?
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GLM 5.2 has a larger context window: GLM 5.2 supports 262K tokens vs o3 at 200K tokens.
Do both GLM 5.2 and o3 support vision?
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o3 supports vision/image input, but GLM 5.2 does not.
Which has better coding performance, GLM 5.2 or o3?
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GLM 5.2 scores higher on SWE-bench Verified: GLM 5.2 resolves 79% vs o3 at 62%.
What are the key differences between GLM 5.2 and o3?
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Key differences: only o3 supports vision input. Compare full specs on this page.
Which model should I choose for my use case?
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If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both GLM 5.2 and o3 for free on idapt.app to see which performs better for your specific needs.