Model Comparison
GPT-5.3 CodexGemini 2.5 Pro
Let's see who can write code better - GPT-5.3 Codex or Gemini 2.5 Pro
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
Gemini 2.5 Pro
Description
Advanced Gemini model with massive context capabilities
Specifications
Context Window1.0M
Max Output8K
ReleasedJan 2025
API✓
Pricing (per 1M)
In / Out
$1.25/ $10
Key Features
1M+ token contextState-of-the-art performanceMulti-modal native
Strengths
- ✓Unprecedented context length
- ✓Superior performance
- ✓Advanced capabilities
Weaknesses
- ✗Higher cost than Flash models
- ✗May be slower for simple tasks