Side by side
| Feature | OpenAI Codex | Google Antigravity |
|---|---|---|
| What it does | AI coding agent from OpenAI that handles engineering tasks like bug fixes, refactors, features and code reviews for developers and teams. | Agentic development platform from Google for building software with AI agents, from a desktop IDE to a terminal CLI and SDK. |
| Price from | 71 PLN/mo | 30 USD/mo |
| Free plan | no | yes |
| Platforms | web, chrome, api | web, api, mac, windows, linux |
| API | not stated | yes |
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
Google Antigravity: key features
- Multiple local agents managed in parallel from one command center
- Projects for grouping conversations across workspaces
- Scheduled messages to automate routine tasks
- Terminal CLI for autonomous coding agents and shell commands
- Python SDK for building custom agents on the same harness
- Agentic IDE with agent manager, artifacts and codebase understanding
FAQ
Is OpenAI Codex or Google Antigravity better?
It depends on the job - compare prices, free plans and features in the table above.
Are OpenAI Codex and Google Antigravity free?
OpenAI Codex: No - according to the vendor, it is paid only. Google Antigravity: Yes, there is a free plan. Free plan without subscription: access to a variety of agent models, unlimited Tab completions, unlimited Command requests, basic weekly rate limits.