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OpenAI

GPT-5 mini

VS
Z.ai (Zhipu AI)

GLM-5.2

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

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, GLM-5.2 is the premium intelligence choice, scoring 16.4% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: GPT-5 mini is 3.1x cheaper to run and delivers 1.0x faster throughput. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, GPT-5 mini offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of GLM-5.2 fully justifies the cost.

Model Specs

GPT-5 mini

Benchmarks & Scores

Coding (swe-bench-pro)
45.7%
Reasoning (gpqa-diamond)
81.6%

Cost & Performance

Cost (per 1M tokens)3.1x cheaper
$0.69Input: $0.25 | Output: $2.00
Speed
86 tps
Context Window
400k tokens
Model Specs

GLM-5.2

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+16.4%)
62.1%
Reasoning (gpqa-diamond)Winner (+9.6%)
91.2%

Cost & Performance

Cost (per 1M tokens)
$2.15Input: $1.40 | Output: $4.40
Speed
N/A
Context WindowLarger
1.05M tokens

Frequently Asked Questions

GPT-5 mini is cheaper than GLM-5.2. GPT-5 mini has a blended cost of $0.69/1M tokens, which is about 3.1x cheaper than GLM-5.2 at $2.15/1M tokens.

Speed data is not available for GLM-5.2, while GPT-5 mini generates 86 tokens per second.

GLM-5.2 is better for coding tasks. It scores 62.1% on coding evaluations (swe-bench-pro) compared to GPT-5 mini which scores 45.7%.

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