GPT-5.3 Codex

gpt-5.3-codex

OpenAI's next-gen Codex — large-scale code and data analysis on the Pro plan.

CodeAnalysis

Technical Specifications

API Identifier	`gpt-5.3-codex`
Plans	Pro
Maximum Context	400 000 tokens
Vision (images)	No
Native Web Access	No
Image Generation	No
Input Cost	$2.20 / M tokens
Output Cost	$8.80 / M tokens

Overview

GPT-5.3 Codex is the latest evolution of OpenAI's Codex family, optimized for large-scale code and data analysis. With 400,000 tokens of context and a slightly lower cost than Codex Max, it's an excellent choice for development teams handling large volumes of code or data. Mingo selects it on the Pro plan alongside Codex Max and Qwen3.7 Max for advanced code tasks.

Strengths

Next generation400K contextLarge-scale codeData analysis

Ideal Use Cases

Data pipelines

Designing and debugging large data-processing pipelines.

Large-scale code review

Analyzing large pull requests and detecting inconsistencies.

Advanced automation

Creating complex scripts for workflow automation.

Dataset analysis

Exploring and summarizing large structured datasets.

Pricing

Input Tokens

$2.20

per million tokens

Output Tokens

$8.80

per million tokens

Related Models

Frequently Asked Questions

Does GPT-5.3 Codex replace GPT-5.1 Codex Max?

No, both coexist on Mingo. GPT-5.3 Codex offers an excellent performance/cost ratio for large-scale code and data, while Codex Max remains the reference for maximum depth.

Is GPT-5.3 Codex suited to data analysis?

Yes, Mingo also selects it for data analysis tasks on the Pro plan, thanks to its extended context and reasoning capabilities.

What is the cost of GPT-5.3 Codex?

GPT-5.3 Codex costs $2.20 per million input tokens and $8.80 per million output tokens, slightly cheaper than Codex Max.

Use GPT-5.3 Codex with Mingo

Mingo routes your large-scale code and data tasks to GPT-5.3 Codex on the Pro plan.

Try Mingo for free