Grok 4.5 vs GLM 5.1
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Frequently Asked Questions: Grok 4.5 vs GLM 5.1▼
Which is better, Grok 4.5 or GLM 5.1?
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Based on the Capability Index, Grok 4.5 scores higher (88.5 vs 82.3). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.
Which is cheaper, Grok 4.5 or GLM 5.1?
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GLM 5.1 has a lower blended cost. Grok 4.5: $2.00 input / $6.00 output. GLM 5.1: $0.98 input / $3.08 output.
Which has a larger context window, Grok 4.5 or GLM 5.1?
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Grok 4.5 has a larger context window: Grok 4.5 supports 500K tokens vs GLM 5.1 at 203K tokens.
Do both Grok 4.5 and GLM 5.1 support vision?
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Grok 4.5 supports vision/image input, but GLM 5.1 does not.
What are the key differences between Grok 4.5 and GLM 5.1?
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Key differences: Grok 4.5 has a notably higher capability index (6.2 point gap); GLM 5.1 is significantly cheaper; only Grok 4.5 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 Grok 4.5 and GLM 5.1 for free on idapt.app to see which performs better for your specific needs.