Key Takeaways
Claude Opus 4.1 wins:
- No clear advantages in compared metrics
GPT-5 Codex wins:
- Cheaper input tokens
- Cheaper output tokens
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
Price Advantage
GPT-5 Codex
Benchmark Advantage
GPT-5 Codex
Context Window
GPT-5 Codex
Speed
GPT-5 Codex
Pricing Comparison
Benchmark Comparison
Context & Performance
Capabilities
Feature Comparison
| Feature | Claude Opus 4.1 | GPT-5 Codex |
|---|---|---|
Vision (Image Input) | ||
Tool/Function Calls | ||
Reasoning Mode | ||
Audio Input | ||
Audio Output | ||
PDF Input | ||
Prompt Caching | ||
Web Search |
License & Release
| Property | Claude Opus 4.1 | GPT-5 Codex |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Anthropic | OpenAI |
| Released | Aug 2025 | Sep 2025 |
Claude Opus 4.1 Modalities
Input
imagetextfile
Output
text
GPT-5 Codex Modalities
Input
textimage
Output
text