Model Comparison
GPT-5.3 CodexGemini 3 Pro (Preview)
Let's see who can write code better - GPT-5.3 Codex or Gemini 3 Pro (Preview)
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 3 Pro (Preview)
Description
Next-generation Gemini model with advanced capabilities (preview release)
Specifications
Context Window1.0M
Max Output64K
ReleasedNov 2025
API✓
Pricing (per 1M)
In / Out
$2/ $12
Key Features
Massive 1M token contextLarge 64K output windowNext-gen architectureMulti-modal capabilities
Strengths
- ✓State-of-the-art Gemini model
- ✓Very large output window
- ✓Advanced reasoning capabilities
- ✓Strong multi-modal support
Weaknesses
- ✗Preview release - may have issues
- ✗Higher cost than 2.5 models
- ✗Potentially slower inference
Agent Support
No known agents