GPT-5.1 Codex Max

gpt-5.1-codex-max

OpenAI's most powerful Codex — large refactors and complex code analysis on the Pro plan.

CodeAnalysis

Technical Specifications

API Identifier	`gpt-5.1-codex-max`
Plans	Pro
Maximum Context	400 000 tokens
Vision (images)	No
Native Web Access	No
Image Generation	No
Input Cost	$3.00 / M tokens
Output Cost	$12.00 / M tokens

Overview

GPT-5.1 Codex Max is the flagship of OpenAI's Codex family, built for the most demanding development tasks. With 400,000 tokens of context, it can ingest entire codebases, understand complex architectures and propose coherent large-scale refactors. Mingo selects it on the Pro plan for code and data analysis requiring maximum reasoning depth.

Strengths

Maximum depth400K contextLarge refactorsCode analysis

Ideal Use Cases

Large-scale refactoring

Coherent restructuring of large codebases across multiple files.

Complex code audit

In-depth analysis of software architectures and detection of structural issues.

Framework migration

Porting entire projects from one tech stack to another.

Pipeline generation

Creating CI/CD pipelines and complex automation scripts.

Pricing

Input Tokens

$3.00

per million tokens

Output Tokens

$12.00

per million tokens

Related Models

Frequently Asked Questions

When should I use GPT-5.1 Codex Max instead of Codex Mini?

Codex Max is recommended for massive refactors, analysis of large codebases, or tasks requiring 400K tokens of context. For short scripts, Codex Mini is more economical.

Is GPT-5.1 Codex Max only available on the Pro plan?

Yes, due to its cost and power, Mingo reserves GPT-5.1 Codex Max for the Pro plan.

What is the maximum context of GPT-5.1 Codex Max?

GPT-5.1 Codex Max handles up to 400,000 tokens, twice as much as standard GPT-5.1 Codex.

Use GPT-5.1 Codex Max with Mingo

Mingo routes your most demanding code and analysis tasks to GPT-5.1 Codex Max on the Pro plan.

Try Mingo for free