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OpenAI

GPT-5 mini

VS
Z.ai (Zhipu AI)

GLM-4.5

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

Decision Recommendation

👑 Editorial Verdict: GPT-5 mini strictly dominates GLM-4.5 across all major dimensions. It is not only more cost-effective (blended cost of $0.69 vs $1.00 per 1M tokens) but also delivers superior coding accuracy (45.7% vs 0% on SWE-bench) and faster generation speeds (86 tps vs 0 tps). Unless you have platform lock-in, GPT-5 mini is the clear and optimal choice for all development workloads.

Model Specs

GPT-5 mini

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+)
45.7%
Reasoning (gpqa-diamond)Winner (+1.7%)
81.6%

Cost & Performance

Cost (per 1M tokens)1.5x cheaper
$0.69Input: $0.25 | Output: $2.00
Speed
86 tps
Context WindowLarger
400k 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)
$1.00Input: $0.60 | Output: $2.20
Speed
N/A
Context Window
131.07k tokens

Frequently Asked Questions

GPT-5 mini is cheaper than GLM-4.5. GPT-5 mini has a blended cost of $0.69/1M tokens, which is about 1.5x cheaper than GLM-4.5 at $1.00/1M tokens.

Speed data is not available for GLM-4.5, while GPT-5 mini generates 86 tokens per second.

GPT-5 mini is better for coding tasks. It scores 45.7% on coding evaluations (swe-bench-pro) compared to GLM-4.5 which scores N/A.

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