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OpenAI

GPT-5.4

VS
Z.ai (Zhipu AI)

GLM-4.5

✍️ Analysis by:the whichllmmodel Editorial Team|📅 Updated: June 2026

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, GPT-5.4 is the premium intelligence choice, scoring 57.7% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: GLM-4.5 is 5.6x cheaper to run. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, GLM-4.5 offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of GPT-5.4 fully justifies the cost.

Model Specs

GPT-5.4

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+)
57.7%
Reasoning (gpqa-diamond)Winner (+12.9%)
92.8%

Cost & Performance

Cost (per 1M tokens)
$5.63Input: $2.50 | Output: $15.00
Speed
74 tps
Context WindowLarger
1.05M tokens
Model Specs

GLM-4.5

Benchmarks & Scores

Coding (swe-bench-pro)
N/A
Reasoning (gpqa-diamond)
79.9%

Cost & Performance

Cost (per 1M tokens)5.6x cheaper
$1.00Input: $0.60 | Output: $2.20
Speed
N/A
Context Window
131.07k tokens

Frequently Asked Questions

GLM-4.5 is cheaper than GPT-5.4. GLM-4.5 has a blended cost of $1.00/1M tokens, which is about 5.6x cheaper than GPT-5.4 at $5.63/1M tokens.

Speed data is not available for GLM-4.5, while GPT-5.4 generates 74 tokens per second.

GPT-5.4 is better for coding tasks. It scores 57.7% on coding evaluations (swe-bench-pro) compared to GLM-4.5 which scores N/A.

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