GLM-4.5-Air vs GPT-5 mini
GLM-4.5-Air and GPT-5 mini are closely matched at 24.4 and 27.3 on the LLM Stats Score.
Zhipu AI · OpenAI · Updated for 2026
Which is better?
GLM-4.5-Air and GPT-5 mini are closely matched on the overall LLM Stats Score at 24.4 and 27.3.
In the 2 individual benchmarks reported for both models, GPT-5 mini wins 2; this is a narrower head-to-head signal than the composite indexes.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GLM-4.5-Air
- you need open weights you can self-host or fine-tune
Choose GPT-5 mini
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
- you want the most recent training data — it shipped Aug 2025
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
14 reported for GLM-4.5-Air · 5 for GPT-5 mini
GLM-4.5-Air outperforms in 0 benchmarks, while GPT-5 mini is better at 2 benchmarks (GPQA, Humanity's Last Exam).
GPT-5 mini significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only GPT-5 mini specifies input context (400,000 tokens). Only GPT-5 mini specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
GPT-5 mini supports multimodal inputs, whereas GLM-4.5-Air does not.
GPT-5 mini can handle both text and other forms of data like images, making it suitable for multimodal applications.
GLM-4.5-Air
GPT-5 mini
License
Usage and distribution terms
GLM-4.5-Air is licensed under MIT, while GPT-5 mini uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
MIT
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
GLM-4.5-Air was released on 2025-07-28, while GPT-5 mini was released on 2025-08-07.
GPT-5 mini is 0 month newer than GLM-4.5-Air.
Jul 28, 2025
1.1 years ago
Aug 7, 2025
1.1 years ago
1w newerKnowledge Cutoff
When training data ends
GPT-5 mini has a documented knowledge cutoff of 2024-05-30, while GLM-4.5-Air's cutoff date is not specified.
We can confirm GPT-5 mini's training data extends to 2024-05-30, but cannot make a direct comparison without GLM-4.5-Air's cutoff date.
—
May 2024
Outputs Comparison
Judge for yourself.
Run your own prompts against GLM-4.5-Air and GPT-5 mini side-by-side, then vote on the output you prefer.
FAQ
Common questions about GLM-4.5-Air vs GPT-5 mini.