GLM-4vsGPT-o3
Zhipu AI vs OpenAI — Side-by-side model comparison
Head-to-Head Comparison
| Metric | GLM-4 | GPT-o3 |
|---|---|---|
| Provider | ||
| Arena Rank | — | #2 |
| Context Window | 128K | 200K |
| Input Pricing | Undisclosed/1M tokens | $2.00/1M tokens |
| Output Pricing | Undisclosed/1M tokens | $8.00/1M tokens |
| Parameters | Undisclosed | Undisclosed |
| Open Source | No | No |
| Best For | Chinese language tasks, reasoning, coding | Advanced reasoning, agentic tasks, research |
| Release Date | Jan 16, 2024 | Apr 16, 2025 |
GLM-4
GLM-4 is Zhipu AI's flagship multimodal model, one of the leading AI models developed in China. It supports text, image, and video understanding with strong performance on Chinese-language tasks while maintaining competitive English capabilities. GLM-4 powers Zhipu's ChatGLM assistant and is widely used across Chinese enterprises for customer service, content generation, and data analysis applications.
View Zhipu AI profile →GPT-o3
GPT-o3 is OpenAI's most advanced reasoning model, succeeding o1 as the frontier of deliberative AI. It uses an enhanced chain-of-thought approach where the model spends more compute time 'thinking' before responding, dramatically improving performance on complex STEM, mathematical, and logical reasoning tasks. With a 200K token context window and the ability to use tools during reasoning, o3 represents a significant leap in AI problem-solving capabilities. It achieved state-of-the-art results on the ARC-AGI benchmark, demonstrating near-human performance on novel reasoning challenges. The model is particularly strong at multi-step mathematical proofs, complex code debugging, and scientific analysis where careful step-by-step reasoning is essential. Originally priced at a premium, an 80% price reduction in June 2025 made o3 accessible to a much broader range of developers and applications.
View OpenAI profile →Key Differences: GLM-4 vs GPT-o3
GPT-o3 supports a larger context window (200K), allowing it to process longer documents in a single request.
When to use GLM-4
- +Your use case involves chinese language tasks, reasoning, coding
When to use GPT-o3
- +You need to process long documents (200K context)
- +Your use case involves advanced reasoning, agentic tasks, research
The Verdict
GPT-o3 wins our head-to-head comparison with 4 out of 5 category wins. It's the stronger choice for advanced reasoning, agentic tasks, research, though GLM-4 holds an edge in chinese language tasks, reasoning, coding.
Last compared: March 2026 · Data sourced from public benchmarks and official pricing pages