GPT-5.1 Codex Max
GPT-5.1 Codex Max is the maximum-context variant of GPT-5.1 Codex, built for analyzing and working with large codebases. Its extended context window allows it to understand entire repositories, making it ideal for large-scale refactoring, migration, and architectural analysis.
Max excels where other code models struggle — understanding cross-file dependencies, architectural patterns, and system-wide implications of changes.
Key Features
256K token context for full codebase analysis
Cross-file dependency understanding
Architectural pattern recognition
Large-scale refactoring and migration support
System-wide impact analysis
Ideal Use Cases
Large codebase migration and modernization
Architectural analysis and documentation
Cross-file refactoring at scale
Legacy system understanding and documentation
Technical Specifications
| Context Window | 256K tokens |
| Modality | Text, Code → Text, Code |
| Provider | OpenAI |
| Category | Code Generation |
| Max Output | 64K tokens |
| Best For | Large codebase analysis |
API Usage
1 curl -X POST https://api.vincony.com/v1/chat/completions \ 2 -H "Authorization: Bearer YOUR_API_KEY" \ 3 -H "Content-Type: application/json" \ 4 -d '{ 5 "model": "openai/gpt-5.1-codex-max", 6 "messages": [ 7 { "role": "user", "content": "Hello, GPT-5.1 Codex Max!" } 8 ] 9 }'
Replace YOUR_API_KEY with your Vincony API key. OpenAI-compatible endpoint — works with any OpenAI SDK.
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Frequently Asked Questions
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