GLM-4.5 vs o1-pro
GLM-4.5 and o1-pro are closely matched at 27.7 and 19.7 on the LLM Stats Score.
Zhipu AI · OpenAI · Updated for 2026
Which is better?
GLM-4.5 and o1-pro are closely matched on the overall LLM Stats Score at 27.7 and 19.7.
In the 2 individual benchmarks reported for both models, GLM-4.5 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
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
- you want the most recent training data — it shipped Jul 2025
- you need open weights you can self-host or fine-tune
Choose o1-pro
- you are already invested in the OpenAI ecosystem
At a glance
The differences that matter most.
Individual benchmarks
14 reported for GLM-4.5 · 2 for o1-pro
GLM-4.5 outperforms in 2 benchmarks (AIME 2024, GPQA), while o1-pro is better at 0 benchmarks.
GLM-4.5 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 GLM-4.5 specifies input context (131,072 tokens). Only GLM-4.5 specifies output context (131,072 tokens).
Input capabilities
Documented input modalities across available providers
o1-pro supports multimodal inputs, whereas GLM-4.5 does not.
o1-pro can handle both text and other forms of data like images, making it suitable for multimodal applications.
GLM-4.5
o1-pro
License
Usage and distribution terms
GLM-4.5 is licensed under MIT, while o1-pro 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 was released on 2025-07-28, while o1-pro was released on 2024-12-17.
GLM-4.5 is 7 months newer than o1-pro.
Jul 28, 2025
1.2 years ago
7mo newerDec 17, 2024
1.8 years ago
Knowledge Cutoff
When training data ends
o1-pro has a documented knowledge cutoff of 2023-09-30, while GLM-4.5's cutoff date is not specified.
We can confirm o1-pro's training data extends to 2023-09-30, but cannot make a direct comparison without GLM-4.5's cutoff date.
—
Sep 2023
Outputs Comparison
Judge for yourself.
Run your own prompts against GLM-4.5 and o1-pro side-by-side, then vote on the output you prefer.
FAQ
Common questions about GLM-4.5 vs o1-pro.