Key Takeaways
KAT-Coder-Pro V1 wins:
- Cheaper input tokens
- Cheaper output tokens
- Faster response time
- Better at math
GPT-5.3 Codex wins:
- Larger context window
- Higher intelligence benchmark
- Better at coding
- Supports vision
- Has reasoning mode
Price Advantage
KAT-Coder-Pro V1
Benchmark Advantage
GPT-5.3 Codex
Context Window
GPT-5.3 Codex
Speed
KAT-Coder-Pro V1
Pricing Comparison
Benchmark Comparison
Context & Performance
Capabilities
Feature Comparison
| Feature | KAT-Coder-Pro V1 | GPT-5.3 Codex |
|---|---|---|
Vision (Image Input) | ||
Tool/Function Calls | ||
Reasoning Mode | ||
Audio Input | ||
Audio Output | ||
PDF Input | ||
Prompt Caching | ||
Web Search |
License & Release
| Property | KAT-Coder-Pro V1 | GPT-5.3 Codex |
|---|---|---|
| License | Open Source | Proprietary |
| Author | Kwaipilot | OpenAI |
| Released | Nov 2025 | Feb 2026 |
KAT-Coder-Pro V1 Modalities
Input
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Output
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GPT-5.3 Codex Modalities
Input
textimage
Output
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