G
GAI coding assistant and agents for editors, terminal, desktop and GitHub
Free, from $10/mo
Aider vs OpenAI Codex
Pricing, features, platforms and who each one suits — side by side.
A
Choose Aider if…
- you want open source you can self-host or audit
- you're in its core audience: software developers, command-line users
O
Choose OpenAI Codex if…
- you need an API to build on
- you work on Web, iOS, Slack
- you're in its core audience: software developers, engineering teams
Side by side
Feature Aider OpenAI Codex
Pricing modelFreeFreemium
Starting priceFree$8/mo
Free plan
Free trial
API
Open source
Security and compliance—SOC 2 Type II, ISO 27001, GDPR, HIPAA
Updates, last 90 days—5
Agent mode—
CLI / terminal
Cloud agents—
AI PR review—
Bring your own key—
Local / self-hosted models—
Platforms—Web, iOS, API, Slack
CategoryCode AssistantsCode Assistants
Company—OpenAI OpCo, LLC
Based in—United States
Founded——
Part of——
Key features
A Aider
- Terminal-based AI pair programming
- Works with cloud and local LLMs
- Map of the whole codebase for larger projects
- Supports 100+ programming languages
- Auto-commits changes to git with descriptive messages
- Runs linters and tests, then fixes problems they find
- Uses images and web pages as context
- Voice requests and in-IDE code comments
O OpenAI Codex
- Desktop app for local coding chats
- Command-line interface (CLI)
- IDE extension
- Cloud tasks through Codex on the web
- Automatic GitHub code review
- Slack integration
- SDK for scriptable workflows
- Works with an API key and pay-per-use billing
Plans and prices
From each vendor's site. Prices change — confirm before buying.
Aider
Free. Plan details aren't published.
OpenAI Codex
Free$0/month
Go$8/month
Plus$20/month
ProFrom $100/month
Business$20/user/month billed annually; $25 billed monthly
Enterprise & EduContact sales
API KeyPay per usage
Strengths and limitations
Aider
- Code is public on GitHub
- Works with many LLMs, including local models
- Every edit is committed to git, so changes are easy to review or undo
- Runs linters and tests automatically
- Terminal-only interface with no GUI app listed
- You supply your own model API key
- Installed through Python and pip
OpenAI Codex
- Free plan includes basic Codex use in the desktop app
- Available in the desktop app, CLI, IDE, web, iOS and SDK
- Enterprise controls such as SCIM, RBAC, EKM and data residency
- API key option for pay-per-use billing
- Free and Go plans have no published usage numbers
- Plus usage limits are given only as estimated ranges
- API key use doesn't include cloud features such as code review or Slack
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Built from each vendor's public website; we haven't tested them hands-on. Editorial policy