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Z.ai: GLM 5 vs OpenAI: GPT-5.4 Mini

Head-to-head API cost, context, and performance comparison. Synced at 2:30:31 PM.

Executive Summary

When evaluating Z.ai: GLM 5 against OpenAI: GPT-5.4 Mini, the pricing structure is a key differentiator. Z.ai: GLM 5 is approximately 49% more cost-effective per 1 million tokens overall.

However, when looking at raw reasoning capabilities, Z.ai: GLM 5 leads with a statistical ELO score of 1456. For tasks involving complex logic, coding, or instruction-following, developers might prefer Z.ai: GLM 5, provided their budget allows for the API burn rate.

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Raw Technical comparison

Metric
Z.ai: GLM 5
OpenAI: GPT-5.4 Mini
Performance (ELO)
1456
1454
Input Cost / 1M
$0.60
$0.75
Output Cost / 1M
$2.08
$4.50
Context Window
202,752 tokens
400,000 tokens

Verdict

If you are looking for pure performance and capability, Z.ai: GLM 5 is statistically superior. However, if API burn rate is the primary concern, Z.ai: GLM 5 wins out aggressively in pricing.

People Also Ask

Is Z.ai: GLM 5 cheaper than OpenAI: GPT-5.4 Mini?

Yes. Z.ai: GLM 5 is cheaper for both input and output generation compared to OpenAI: GPT-5.4 Mini. Exploring alternatives often yields cost reductions.

Which model has the larger context window?

The OpenAI: GPT-5.4 Mini model has the advantage in memory, offering a massive 400,000 token limit for document ingestion.

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