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OpenAI

GPT-5.4 mini

VS
Z.ai (Zhipu AI)

GLM-5.1

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

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, GLM-5.1 is the premium intelligence choice, scoring 4.0% higher on coding benchmarks. However, GPT-5.4 mini compensates by delivering 1.0x faster throughput. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, GPT-5.4 mini offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of GLM-5.1 fully justifies the cost.

Model Specs

GPT-5.4 mini

Benchmarks & Scores

Coding (swe-bench-pro)
54.4%
Reasoning (gpqa-diamond)Winner (+1.3%)
87.5%

Cost & Performance

Cost (per 1M tokens)
$1.69Input: $0.75 | Output: $4.50
Speed
201 tps
Context WindowLarger
400k tokens
Model Specs

GLM-5.1

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+4.0%)
58.4%
Reasoning (gpqa-diamond)
86.2%

Cost & Performance

Cost (per 1M tokens)1.1x cheaper
$1.50Input: $0.98 | Output: $3.08
Speed
N/A
Context Window
204.8k tokens
Read our data collection methodology

Frequently Asked Questions

GLM-5.1 is cheaper than GPT-5.4 mini. GLM-5.1 has a blended cost of $1.50/1M tokens, which is about 1.1x cheaper than GPT-5.4 mini at $1.69/1M tokens.

Speed data is not available for GLM-5.1, while GPT-5.4 mini generates 201 tokens per second.

GLM-5.1 is better for coding tasks. It scores 58.4% on coding evaluations (swe-bench-pro) compared to GPT-5.4 mini which scores 54.4%.

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