Key Takeaways
GPT-5.1 Chat wins:
- Cheaper input tokens
- Supports vision
GLM 5 wins:
- Cheaper output tokens
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
Price Advantage
GPT-5.1 Chat
Benchmark Advantage
GLM 5
Context Window
GLM 5
Speed
GLM 5
Pricing Comparison
Benchmark Comparison
Context & Performance
Capabilities
Feature Comparison
| Feature | GPT-5.1 Chat | GLM 5 |
|---|---|---|
Vision (Image Input) | ||
Tool/Function Calls | ||
Reasoning Mode | ||
Audio Input | ||
Audio Output | ||
PDF Input | ||
Prompt Caching | ||
Web Search |
License & Release
| Property | GPT-5.1 Chat | GLM 5 |
|---|---|---|
| License | Proprietary | Open Source |
| Author | OpenAI | Z-ai |
| Released | Nov 2025 | Feb 2026 |
GPT-5.1 Chat Modalities
Input
fileimagetext
Output
text
GLM 5 Modalities
Input
text
Output
text