OpenAIGPT-5 miniVSZ.ai (Zhipu AI)GLM-5.1
Our Take
We recommend GLM-5.1 if you need peak intelligence for reasoning and coding tasks, or the 3.1x cheaper GPT-5 mini to optimize your budget for high-volume pipelines. While GLM-5.1 holds a clear performance lead, it carries a heavy price premium. Choose GLM-5.1 for complex logic, or GPT-5 mini for budget efficiency.
▶WHY?
Benchmark Calculations & Evidence:
Coding Benchmarks: Both models were evaluated on the SWE-bench Pro benchmark. GLM-5.1 scored 58.4%, while GPT-5 mini scored 45.7%.
Reasoning Benchmarks: Both models were evaluated on the GPQA Diamond benchmark. GLM-5.1 scored 86.2%, while GPT-5 mini scored 81.6%.
Cost Efficiency: GPT-5 mini pricing ($0.25/M input, $2/M output) is 3.1x cheaper than GLM-5.1 ($1.4/M input, $4.4/M output).
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Benchmarks & Scores
Coding (swe-bench-pro)
45.7%complex codebases, multi-file repositories, and architectural planning
Reasoning (gpqa-diamond)
81.6%graduate-level science QA
Cost & Context
Cost (per 1M tokens)3.1x cheaper
$0.69Input: $0.25 | Output: $2.00Context WindowLarger
400k tokensBenchmarks & Scores
Coding (swe-bench-pro)Winner (+12.7%)
58.4%complex codebases, multi-file repositories, and architectural planning
Reasoning (gpqa-diamond)Winner (+4.6%)
86.2%graduate-level science QA
Cost & Context
Cost (per 1M tokens)
$2.15Input: $1.40 | Output: $4.40Context Window
202.75k tokensFrequently Asked Questions about GPT-5 mini vs GLM-5.1
GPT-5 mini is cheaper than GLM-5.1. GPT-5 mini has a blended cost of $0.69/1M tokens, which is about 3.1x cheaper than GLM-5.1 at $2.15/1M tokens.
GLM-5.1 is better for coding tasks on this benchmark. It scores 58.4% on swe-bench-pro (complex codebases, multi-file repositories, and architectural planning) compared to GPT-5 mini which scores 45.7%.
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