OpenAI Codex vs Replit
Which is better in 2026? Five scores, side by side.
OpenAI Codex is the better app overall, scoring 8.7 to 8.1. OpenAI Codex wins on 3 of the 5 scores, Replit on 1, with 1 tied.
ChatGPT subscribers who want a capable coding agent at no extra cost
Learners and makers who want to build and host an app in one place
Score by score
The details
| Feature | OpenAI Codex | Replit |
|---|---|---|
| Category | Developer Tools | Developer Tools |
| Category rank | #8 of 18 | #16 of 18 |
| Developer | OpenAI | Replit |
| Pricing | Free + paid plans | Free + paid plans |
| Usable for free | Yes | Yes |
| iPhone & iPad | ✓ | ✓ |
| Android | ✓ | ✓ |
| Mac | ✓ | ✓ |
| Windows | ✓ | ✓ |
| Linux | ✓ | — |
| Web | ✓ | ✓ |
Common questions
Is OpenAI Codex better than Replit?
OpenAI Codex is the better app overall, scoring 8.7 to 8.1. OpenAI Codex wins on 3 of the 5 scores, Replit on 1, with 1 tied.
Which is cheaper, OpenAI Codex or Replit?
OpenAI Codex: Included in every ChatGPT plan, even Free; Plus is $20 a month and Pro from $100. Replit: Free Starter plan with daily Agent credits; Core is $20 a month, or $18 billed yearly. On value for money, OpenAI Codex scores higher.
Do OpenAI Codex and Replit work on the same devices?
Only OpenAI Codex runs on Linux.
Which is more private, OpenAI Codex or Replit?
OpenAI Codex scores higher on privacy (7.0/10). On personal ChatGPT plans, Codex tasks can train OpenAI's models unless you turn off Improve the model for everyone. Business, Enterprise and Edu content isn't used for training by default.
Strengths and weaknesses
OpenAI Codex
- Included even with a free ChatGPT account
- Open-source CLI under the Apache 2.0 licence
- Runs on Mac, Windows and Linux
- Free and Go plans are meant for light tasks only
- Merged ChatGPT desktop app drew complaints of confusion
- Personal-plan tasks can train models unless you opt out
Codex is OpenAI's coding agent, and it now comes with every ChatGPT plan. Use it in the ChatGPT desktop app, the open-source Codex CLI, your IDE or in the cloud, where it can work on several tasks at once and review pull requests on GitHub. You can keep an eye on sessions from the ChatGPT phone app too. July's merge of the Codex app into ChatGPT confused plenty of people, and personal-plan tasks can train models unless you opt out.
Full OpenAI Codex review
Replit
- Builds, hosts and stores data in one place
- Works in a browser, on phones and on desktop
- Free Mode lets you chat without spending credits
- Free plan is no longer shown on the pricing page
- Free published apps go offline after 30 days
- Only Pro users can switch off AI training
Replit is a coding workspace that lives in your browser. Tell its Agent what you want, and it builds and hosts the app, with a database and logins ready to use. It can make web apps, websites, slide decks and dashboards. You can download any project as a zip. The free Starter plan gives daily Agent credits and one published app that goes offline after 30 days. Core costs $20 a month.
Full Replit review
