Codex vs Supermaven: Side-by-Side Comparison 2026
Codex vs Supermaven 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. Supermaven is an editor extension from Supermaven (acquired by Cursor) — ultra-fast ai code completion (sunset).
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
Supermaven
Supermaven was an ultra-fast AI code completion tool. Acquired by Anysphere (Cursor) in November 2024 and sunset in November 2025. Its technology now powers Cursor's Tab AI. Existing extensions still provide basic autocomplete but no new features or paid plans.
- ✓ Code completions
- ✓ AI chat
- ✓ Adaptive learning
- ✓ Low-latency suggestions
Free / $10/mo · 3 plans
| Feature | Codex | Supermaven |
|---|---|---|
| Category | Agent / CLI | Extension |
| Starting Price | Free | Free |
| Model Family | GPT / Codex | GPT-based |
| Agentic Mode | ✓ | — |
| Multi-File Editing | ✓ | — |
| Terminal Commands | ✓ | — |
| Test Generation | ✓ | — |
| Debugging | ✓ | — |
| Refactoring | ✓ | — |
| Documentation | ✓ | — |
| Git Integration | ✓ | — |
| Open Source | Yes (CLI) | No |
Pricing verified Feb 25, 2026. Codex pricing | Supermaven pricing
Key Differences
- Category: Codex is an AI agent and a CLI-based coding agent; Supermaven is an editor extension.
- Starting price: Codex starts at $8/mo; Supermaven starts at $10/mo.
- Model family: Codex uses GPT / Codex; Supermaven uses GPT-based.
- Agentic mode: Codex supports agentic mode; Supermaven does not.
- Open source: Codex: Yes (CLI). Supermaven: No.
- Bring your own key: Codex supports BYOK; Supermaven does not.
- Platforms: Codex runs on Linux, Web, Windows (experimental), macOS; Supermaven runs on Desktop.
- Provider: Codex is built by OpenAI; Supermaven is built by Supermaven (acquired by Cursor).
- Capabilities: Codex has multi-file editing; Codex has terminal commands; Codex has test generation; Codex has debugging.
Which Should You Choose?
Choose Codex if you want asynchronous coding tasks you can fire off and review when ready. Choose Supermaven if you want ultra-low-latency completions that adapt to your coding style. Read our full reviews to see which fits your workflow.