Key Takeaways
Claude Opus 4.5 wins:
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
- Has reasoning mode
ChatGPT-4o wins:
- Cheaper output tokens
Price Advantage
ChatGPT-4o
Benchmark Advantage
Claude Opus 4.5
Context Window
Claude Opus 4.5
Speed
Claude Opus 4.5
Pricing Comparison
Benchmark Comparison
Context & Performance
Capabilities
Feature Comparison
| Feature | Claude Opus 4.5 | ChatGPT-4o |
|---|---|---|
Vision (Image Input) | ||
Tool/Function Calls | ||
Reasoning Mode | ||
Audio Input | ||
Audio Output | ||
PDF Input | ||
Prompt Caching | ||
Web Search |
License & Release
| Property | Claude Opus 4.5 | ChatGPT-4o |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Anthropic | OpenAI |
| Released | Nov 2025 | Unknown |
Claude Opus 4.5 Modalities
Input
fileimagetext
Output
text
ChatGPT-4o Modalities
Input
Output