Model Comparison
GPT-5 CodexGPT-5 Nano
Let's see who can write code better - GPT-5 Codex or GPT-5 Nano
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
GPT-5 Nano
Description
Ultra-lightweight version of GPT-5
Specifications
Context Window272K
Max Output4K
ReleasedJun 2025
API✓
Pricing (per 1M)
In / Out
$0.05/ $0.4
Key Features
Minimal resource usageEdge deployment readyBasic GPT-5 capabilities
Strengths
- ✓Very low cost
- ✓Fast responses
- ✓Good for simple tasks
Weaknesses
- ✗Not yet released
- ✗Limited capabilities