Side by side
| Feature | Claude | OpenAI Codex |
|---|---|---|
| What it does | AI assistant by Anthropic for chat, writing, coding and research, used by individuals and teams. | AI coding agent from OpenAI that handles engineering tasks like bug fixes, refactors, features and code reviews for developers and teams. |
| Price from | 17 USD/mo | 71 PLN/mo |
| Free plan | yes | no |
| Platforms | web, ios, android, mac, windows, linux, api, chrome | web, chrome, api |
| API | yes | not stated |
Claude: key features
- Chat on web, iOS, Android and desktop
- Web search
- Memory across conversations
- Create files and execute code
- Projects to organize chats and documents
- Connectors and remote MCP for external tools
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
FAQ
Is Claude or OpenAI Codex better?
It depends on the job - compare prices, free plans and features in the table above.
Are Claude and OpenAI Codex free?
Claude: Yes, there is a free plan. Free plan: chat on web and apps, code generation and data visualization, writing, web search, memory, file creation and code execution, desktop extensions, connectors, extended thinking. Limited use, no payment required. OpenAI Codex: No - according to the vendor, it is paid only.