Model Comparison
GPT-5 CodexGemini 2.5 Flash
Let's see who can write code better - GPT-5 Codex or Gemini 2.5 Flash
Model Information
GPT-5 Codex
Description
Flagship model from OpenAI optimised for coding tasks
Specifications
Context Window272K
Max Output33K
ReleasedSep 2025
API✗
Pricing (per 1M)
In / Out
$1.25/ $10
Key Features
CodingAdvanced reasoningMulti-modal native
Strengths
- ✓State-of-the-art performance
- ✓Optimised for coding
- ✓Large context window
Weaknesses
- ✗Likely very expensive
- ✗Unknown specifications
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