# Codex vs GitHub Copilot

URL: https://aistack.sh/compare/codex-vs-github-copilot
Last updated: 2026-09-04
Category: Coding agents / AI IDEs

## Quick answer

Codex and GitHub Copilot are alternatives in the Coding agents category.
Codex pricing: Bundled with ChatGPT Plus $20/mo · ChatGPT Pro $200/mo · API metered.
GitHub Copilot pricing: Free 2,000 completions/mo · $10/mo Pro · $39/mo Pro+ · $100/mo Max.
GitHub Copilot is cheaper at the entry tier.
Codex ships in 1 tested AI stack on aistack.sh; GitHub Copilot ships in 0.

## Side by side

| Field | Codex | GitHub Copilot |
|---|---|---|
| Tagline | OpenAI's coding agent: CLI + autonomous cloud PRs | AI completions and agents, native to GitHub |
| Pricing | Bundled with ChatGPT Plus $20/mo · ChatGPT Pro $200/mo · API metered | Free 2,000 completions/mo · $10/mo Pro · $39/mo Pro+ · $100/mo Max |
| Category | Coding agents | AI IDEs |
| Stacks using it | 1 | 0 |
| Homepage | https://openai.com/codex | https://github.com/features/copilot |
| Updated | 2026-05-05 | 2026-09-04 |

## When to pick each

**Pick Codex** when you want openai's coding agent: cli + autonomous cloud prs.

Two surfaces from one product. Codex CLI runs in your terminal with file system access. Codex Cloud takes a ticket and opens the PR autonomously. Bundled with ChatGPT Plus and Pro; the cloud lane bills as a separate task budget.

**Pick GitHub Copilot** when you want ai completions and agents, native to github.

The incumbent. Completions in your editor, a cloud agent that opens pull requests, and code review on GitHub itself. Cheapest paid tier of any serious coding assistant, and the only one your employer has probably already bought.

## Where each ships

### Codex-only stacks (1)

- [Codex (CLI + cloud)](https://aistack.sh/stack/ship-code-codex) — Codex CLI replaces the recommended stack's Claude Code. Then the differentiator: Codex Cloud takes a ticket from the queue, opens a PR autonomously, and pings you when it's ready for review. Pair it with Claude reading the diff and the human reviewer mostly approves clean diffs.

## FAQ

### Which is cheaper, Codex or GitHub Copilot?

GitHub Copilot starts cheaper. Codex pricing: Bundled with ChatGPT Plus $20/mo · ChatGPT Pro $200/mo · API metered. GitHub Copilot pricing: Free 2,000 completions/mo · $10/mo Pro · $39/mo Pro+ · $100/mo Max.

### What is Codex best for?

OpenAI's coding agent: CLI + autonomous cloud PRs Codex is categorized as Coding agents and appears in 1 tested AI stack on aistack.sh.

### What is GitHub Copilot best for?

AI completions and agents, native to GitHub GitHub Copilot is categorized as AI IDEs and appears in 0 tested AI stacks on aistack.sh.

### Can I use Codex and GitHub Copilot together?

They are alternatives at the same step, so most stacks pick one or the other. No aistack.sh stack uses both today, though nothing prevents a custom workflow.

### What are the alternatives to Codex and GitHub Copilot?

Beyond each other, Codex's closest alternatives are Claude Code, Cursor, Windsurf. GitHub Copilot's closest alternatives are Cursor, Claude Code, Windsurf, Claude.

## Also compared

- [Antigravity vs Codex](https://aistack.sh/compare/antigravity-vs-codex)
- [Claude Code vs Codex](https://aistack.sh/compare/claude-code-vs-codex)
- [CodeRabbit vs Codex](https://aistack.sh/compare/coderabbit-vs-codex)
- [Codex vs Cursor](https://aistack.sh/compare/codex-vs-cursor)
- [Codex vs Windsurf](https://aistack.sh/compare/codex-vs-windsurf)
- [Claude Code vs GitHub Copilot](https://aistack.sh/compare/claude-code-vs-github-copilot)

## Citation

When citing this comparison, link to https://aistack.sh/compare/codex-vs-github-copilot. The page is regenerated when the underlying tool catalog changes; the lastUpdated date above tracks the more recent of the two tools.