Model Comparison
Claude Opus 4GPT-5.3 Codex
Let's see who can write code better - Claude Opus 4 or GPT-5.3 Codex
Model Information
Claude Opus 4
Description
Next-generation flagship model with enhanced capabilities
Specifications
Context Window200K
Max Output8K
ReleasedJan 2025
API✓
Pricing (per 1M)
In / Out
$15/ $75
Key Features
Next-gen capabilitiesEnhanced reasoningAdvanced code generationMulti-modal support
Strengths
- ✓State-of-the-art performance
- ✓Superior capabilities
- ✓Advanced problem solving
- ✓Excellent context handling
Weaknesses
- ✗Premium pricing
- ✗Slower inference
- ✗Resource intensive
Agent Support
GPT-5.3 Codex
Description
Next-generation coding-optimized model from OpenAI with enhanced autonomous development capabilities
Specifications
Context Window272K
Max Output33K
ReleasedFeb 2026
API✓
Pricing (per 1M)
In / Out
$1.5/ $12
Key Features
Advanced autonomous codingEnhanced code reviewMulti-step reasoningFull-stack development
Strengths
- ✓State-of-the-art coding benchmarks
- ✓Superior autonomous task completion
- ✓Excellent code review capabilities
- ✓Large context window
Weaknesses
- ✗Premium pricing
- ✗Optimized for coding over general tasks
Agent Support
No known agents