Model Details

GPT-5.1 Codex Max API

Extended context for large-scale projects. Handle massive codebases, entire repositories, and complex multi-file refactoring tasks.

Pricing Comparison

ProviderInput / 1MOutput / 1M
OpenAI Official$1.25$10.00
Crouter$0.50$1.25$4.00$10.00
You Save60%60%

All prices per 1M tokens. No hidden fees, no monthly minimums.

Key Features

400K Context Window

Process entire repositories and large codebases in a single request. Ideal for monorepo projects and comprehensive code analysis.

Code-Optimized

Specialized for software development with deep understanding of code structure, patterns, and best practices across all languages.

Multi-File Reasoning

Understand relationships between files, modules, and components. Perfect for refactoring and architectural changes.

Advanced Code Analysis

Detect complex bugs, security vulnerabilities, and performance issues across entire projects. Provides comprehensive recommendations.

Perfect For

Large Codebase Analysis

Analyze entire repositories, understand architecture, and identify improvement opportunities. Handles monorepos and complex project structures.

Multi-File Refactoring

Refactor across dozens of files while maintaining consistency. Updates imports, references, and dependencies automatically.

Architecture Planning

Design system architecture, plan migrations, and evaluate technical decisions. Considers project-wide implications.

Legacy Code Modernization

Migrate large legacy codebases to modern frameworks and patterns. Maintains functionality while improving code quality.

Technical Specifications

Model IDgpt-5.1-codex-max
Context Window400,000 tokens
API FormatOpenAI Chat Completions (/v1/chat/completions)
StreamingYes (SSE)
Function CallingYes
JSON ModeYes
Rate Limit70 requests/minute

Quick Start

curl https://api.crouter.dev/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.1-codex-max",
    "messages": [
      {"role": "user", "content": "Analyze this entire codebase and suggest architectural improvements"}
    ]
  }'

View full documentation for more examples and integration guides.

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