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Codex

OpenAI's groundbreaking code generation model that powered GitHub Copilot. Though deprecated in 2023, Codex pioneered AI pair programming by translating natural language to code across 12+ programming languages.
code-ai openai deprecated
Intermediate Level
Deprecated (Replaced by GPT-4)
Starting Price
Try Codex
Category
research
Setup Time
< 2 minutes
research
Category
Intermediate
Difficulty
Active
Status
Web App
Type

What is Codex?

The AI model that launched the code generation revolution

OpenAI Codex was the pioneering AI system that made natural language to code generation mainstream. Released in 2021 and trained on billions of lines of code from GitHub, Codex could understand programmer intent and generate working code in Python, JavaScript, TypeScript, Ruby, Go, and 12+ other languages. As the engine behind GitHub Copilot's initial success, Codex demonstrated that large language models could reason about code structure, APIs, and programming patterns. While officially deprecated in March 2023 (replaced by GPT-3.5 and GPT-4), Codex's legacy continues in modern AI coding assistants.

Key Capabilities

What makes Codex powerful

Natural Language to Code

Convert English descriptions into working code across Python, JS, TypeScript, Ruby, Go, Shell, and more

Implementation Level Expert

GitHub Copilot Engine

Powered the original GitHub Copilot, bringing AI pair programming to millions of developers

Implementation Level Professional

Code Understanding

Trained on public GitHub repos to understand APIs, libraries, and common coding patterns

Implementation Level Advanced

Legacy & Impact

Pioneered the code AI revolution, now succeeded by more advanced models like GPT-4 and specialized systems

Implementation Level Professional

Professional Integration

These capabilities work together to provide a comprehensive AI solution that integrates seamlessly into professional workflows. Each feature is designed with enterprise-grade reliability and performance.

Pricing

Start using Codex today

Deprecated (Replaced by GPT-4)

Starting price

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Quick Information

Category research
Pricing Model Paid
Last Updated 12/7/2025

Tags

code-ai openai deprecated code-generation research historical

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