Model Comparison
GPT-5.3 CodexGemini 2.5 Flash
Let's see who can write code better - GPT-5.3 Codex or Gemini 2.5 Flash
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 Flash
Description
Ultra-fast Gemini model with massive context
Specifications
Context Window1.0M
Max Output8K
ReleasedJan 2025
API✓
Pricing (per 1M)
In / Out
$0.3/ $2.5
Key Features
Massive context windowVery fast inferenceMulti-modal
Strengths
- ✓1M token context
- ✓Extremely fast
- ✓Cost-effective
Weaknesses
- ✗Less capable than Pro version
- ✗May struggle with complex tasks