Codex vs Cursor
Using only the use cases on agentsetups: 69 name Codex, 8 name Cursor, and 4 name both. Codex’s biggest category here is Coding (14); Cursor’s is Coding (3).
This compares what people used each agent for in the sources we list, not which is better. Counts reflect what gets posted, not market share.
Use cases by category
| Category | Codex | Cursor |
|---|---|---|
| Coding | 14 | 3 |
| Agent setup & config | 13 | 2 |
| Productivity & ops | 3 | 1 |
| Knowledge & memory | 3 | 1 |
| Security | 2 | 1 |
| Games | 6 | 0 |
| Content & video | 6 | 0 |
| Research & science | 3 | 0 |
| Design & frontend | 3 | 0 |
| Hardware & IoT | 3 | 0 |
| Personal assistants | 2 | 0 |
| Finance & trading | 2 | 0 |
| Personal life | 2 | 0 |
| Automation & integrations | 2 | 0 |
| Marketing & growth | 1 | 0 |
| DevOps | 1 | 0 |
| Sales & outreach | 1 | 0 |
| Education | 1 | 0 |
| Travel | 1 | 0 |
Used together 4
- Plan with Claude Code, execute with Codex via MCP
Claude Code plans and reviews, Codex executes through the Codex MCP, and notes and skills live in Obsidian.
- Gate “done” claims behind a real test run
One dev found 69% of “done” claims false, another 35% of “tests pass” claims; both re-run checks before the agent may stop.
- Extract your memories from thousands of chats
Instead of an agent run, a builder had Opus 5.5 extract memories across Claude, Cursor and Codex chats to stay portable.
- Route by task type and make each agent review the other
Route by task type and make each agent review the other
Different use cases
Only Codex 65
- Find an exoplanet candidate in NASA TESS data · Research & science
- Have your agent plan and book a whole trip · Travel
- Produce 5-minute AI video ads from a Codex pipeline · Content & video
- Decompile a full game with a long-running agent swarm · Games
- Replace a pro app subscription with your own build · Coding
- Build paid web apps with an Opus front end and Codex · Coding
- Have Codex build a drop-in renderer to fix perf · Coding
- Give one prompt and 6 hours for a 3D visualisation · Design & frontend
Only Cursor 4
- Run a one-person business on Grok Bot plugins · Productivity & ops
- Keep agent state in init.d-style files to survive compaction · Agent setup & config
- Have a small local model vet agent shell commands · Security
- Audit 22 connected MCP servers and keep the two you use · Agent setup & config