Side by side
| Feature | OpenAI Codex | v0 by Vercel |
|---|---|---|
| What it does | AI coding agent from OpenAI that handles engineering tasks like bug fixes, refactors, features and code reviews for developers and teams. | AI assistant that generates working full-stack web apps and UI from prompts, for developers and teams who want to ship sites fast. |
| Price from | 71 PLN/mo | 30 USD/mo |
| Free plan | no | yes |
| Platforms | web, chrome, api | web, ios |
| API | not stated | not stated |
OpenAI Codex: key features
- Parallel multi-agent workflows with progress tracking
- Cloud environments for reusable repo setups that keep tasks running
- Automatic pull request reviews with findings and answers to questions
- Plugins to connect Codex to other tools and apps
- Same agent across ChatGPT, IDE extension and CLI, linked to your ChatGPT account
- Refactoring, feature building and test generation
v0 by Vercel: key features
- Generates full-stack web apps from text prompts
- Visual Design Mode with live preview
- Ready-made templates for apps, landing pages, components and dashboards
- Sync with GitHub repositories
- One-click deployment to Vercel
- Reusable design systems (colors, typography, styles)
FAQ
Is OpenAI Codex or v0 by Vercel better?
It depends on the job - compare prices, free plans and features in the table above.
Are OpenAI Codex and v0 by Vercel free?
OpenAI Codex: No - according to the vendor, it is paid only. v0 by Vercel: Yes, there is a free plan. Free plan: free access to v0, deploy to Vercel, Design Mode, GitHub sync, limited to 7 messages/day. New users also get $5 in one-time credits.