Codex vs Jules: Side-by-Side Comparison 2026
Codex vs Jules comparison 2026. Side-by-side features, pricing & capabilities.
Codex is an AI agent and a CLI-based coding agent from OpenAI — asynchronous autonomous coding agent. Jules is an AI agent from Google — asynchronous ai coding agent.
Codex🏆 Approved
OpenAI's autonomous coding agent. Available via web, desktop app (macOS), CLI (macOS/Linux/Windows), and VS Code extension.
- ✓ Code completions
- ✓ AI chat
- ✓ Agentic mode
- ✓ Multi-file editing
- ✓ Terminal commands
Free / $8/mo · 6 plans
Jules
Autonomous coding agent that integrates with GitHub to plan, execute, and verify code changes asynchronously. Runs tasks in isolated cloud VMs — start a task, close your laptop, and return to review the completed work.
- ✓ Async task execution in cloud VMs
- ✓ GitHub integration with PR creation
- ✓ Task planning and verification
- ✓ Jules CLI for terminal management
- ✓ Jules API for programmatic access
Free / $19.99/mo · 3 plans
| Feature | Codex | Jules |
|---|---|---|
| Category | Agent / CLI | Agent |
| Starting Price | Free | Free |
| Model Family | GPT / Codex | Gemini |
| Documentation | ✓ | — |
| Open Source | Yes (CLI) | No |
Pricing verified Feb 25, 2026. Codex pricing | Jules pricing
Key Differences
- Category: Codex is an AI agent and a CLI-based coding agent; Jules is an AI agent.
- Starting price: Codex starts at $8/mo; Jules starts at $19.99/mo.
- Model family: Codex uses GPT / Codex; Jules uses Gemini.
- Open source: Codex: Yes (CLI). Jules: No.
- Bring your own key: Codex supports BYOK; Jules does not.
- Platforms: Codex runs on Linux, Web, Windows (experimental), macOS; Jules runs on Web.
- Provider: Codex is built by OpenAI; Jules is built by Google.
Which Should You Choose?
Choose Codex if you want asynchronous coding tasks you can fire off and review when ready. Choose Jules if you want to start coding tasks and return later to review completed work. Read our full reviews to see which fits your workflow.