Comparison

GitHub Copilot vs OpenAI Codex

Overview

The world's most widely adopted AI developer tool

GitHub Copilot is GitHub's AI coding assistant for code completion, chat, code review, agent workflows, and IDE-native development help across individual and business plans.

OpenAI Codex

A cloud-based software engineering agent from OpenAI.

openai.com →

OpenAI Codex is an AI coding agent that works in the cloud and terminal to write features, fix bugs and run tests in parallel on your codebase. Available through ChatGPT plans and the CLI, it delegates engineering tasks to autonomous agents backed by OpenAI's coding models.

Features

—Code completion
—AI chat
—Agent mode
—Code review
—Copilot CLI
—Multi-model access
—IDE integrations
—GitHub workflow integration

—Cloud-based autonomous coding agent
—Parallel task execution in sandboxes
—Terminal (Codex CLI) and IDE access
—Reads and edits your repository
—Runs tests and proposes PRs
—Backed by OpenAI coding models

Pricing

GitHub Copilot

freemiumFree plan available

Plan	Price	Notes
Free	Free	Includes limited chat or agent requests and limited completions.
Pro	$10/mo	Individual paid tier.
Pro+	$39/mo	Higher-end individual tier with broader model access.
Business	$19/mo	Per user per month.
Enterprise	$39/mo	Per user per month.