Side by side
| Feature | OpenAI Codex | Greptile |
|---|---|---|
| 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 code review agent that indexes your whole codebase and reviews pull requests for bugs and style issues, for engineering teams. |
| Price from | 71 PLN/mo | 30 USD/mo |
| Free plan | no | yes |
| Platforms | web, chrome, api | web, api |
| 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
Greptile: key features
- Indexes the whole repository as a graph of files, functions and dependencies
- Parallel agents review pull requests and assess impact beyond the diff
- Custom review rules written in plain English
- Learns coding standards from engineers' PR comments
- Greptile MCP and Claude Code plugin to resolve comments with coding agents
- TREX runtime validation of PR branches in a sandbox (beta)
FAQ
Is OpenAI Codex or Greptile better?
It depends on the job - compare prices, free plans and features in the table above.
Are OpenAI Codex and Greptile free?
OpenAI Codex: No - according to the vendor, it is paid only. Greptile: Yes, there is a free plan. Starter plan is free for one active developer, with unlimited repositories and 50 credits per month. A 14-day free trial is offered for Pro.