GLM 5.2 vs GPT 5.4 Pro
Z.ai's frontier reasoning model for long-context agents and software engineering.
OpenAI's most advanced reasoning model, built on GPT 5.4's unified architecture.
No captured outputs for these models yet.
Frequently Asked Questions: GLM 5.2 vs GPT 5.4 Pro▼
Which is better, GLM 5.2 or GPT 5.4 Pro?
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Based on the Capability Index, GPT 5.4 Pro scores higher (89.1 vs 83.4). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.
Which is cheaper, GLM 5.2 or GPT 5.4 Pro?
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GLM 5.2 has a lower blended cost. GLM 5.2: $1.40 input / $4.40 output. GPT 5.4 Pro: $30.00 input / $180.00 output.
Which has a larger context window, GLM 5.2 or GPT 5.4 Pro?
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GPT 5.4 Pro has a larger context window: GLM 5.2 supports 262K tokens vs GPT 5.4 Pro at 1.1M tokens.
Do both GLM 5.2 and GPT 5.4 Pro support vision?
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GPT 5.4 Pro supports vision/image input, but GLM 5.2 does not.
What are the key differences between GLM 5.2 and GPT 5.4 Pro?
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Key differences: GPT 5.4 Pro has a notably higher capability index (5.7 point gap); GLM 5.2 is significantly cheaper; only GPT 5.4 Pro 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 GPT 5.4 Pro for free on idapt.app to see which performs better for your specific needs.