Model Comparison
GPT-5.3 CodexGPT-5 Mini
Let's see who can write code better - GPT-5.3 Codex or GPT-5 Mini
Model Information
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
GPT-5 Mini
Description
Smaller, more efficient version of GPT-5
Specifications
Context Window272K
Max Output8K
ReleasedJun 2025
API✓
Pricing (per 1M)
In / Out
$0.25/ $2
Key Features
Cost-effectiveGood performanceGPT-5 architecture
Strengths
- ✓Lower cost
- ✓Still very capable
- ✓Fast inference
Weaknesses
- ✗Not yet released
- ✗Reduced capabilities vs full GPT-5