Model Comparison
GPT-5 CodexGrok Code Fast 1
Let's see who can write code better - GPT-5 Codex or Grok Code Fast 1
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
Grok Code Fast 1
Description
Fast code generation model from xAI
Specifications
Context Window128K
Max Output8K
ReleasedDec 2024
API✓
Pricing (per 1M)
In / Out
$0.2/ $1.5
Key Features
Fast code generationProgramming expertiseQuick responses
Strengths
- ✓Fast inference
- ✓Code-optimized
- ✓Cost-effective for coding
Weaknesses
- ✗Limited general knowledge
- ✗Focused on code only
Agent Support
No known agents