Codex (OpenAI) vs Devin
Which one should you pick? Here's the full breakdown.
Codex (OpenAI)
OpenAI's cloud-based coding agent -- runs parallel tasks, proposes PRs, and lives inside ChatGPT
Powered by GPT-5.3-Codex / GPT-5.4
Devin
The most autonomous AI coding agent -- it researches, plans, writes code, and tests it without hand-holding
Powered by Multiple models (proprietary orchestration)
| Category | Codex (OpenAI) | Devin |
|---|---|---|
| Ease of Use | 8.0 | 6.5 |
| Output Quality | 8.0 | 8.0 |
| Value | 8.0 | 7.0 |
| Features | 9.0 | 8.0 |
| Overall | 8.3 | 7.4 |
Pricing Comparison
| Feature | Codex (OpenAI) | Devin |
|---|---|---|
| Free Tier | Yes | No |
| Starting Price | $0 | $20 |
Benchmark Head-to-Head
GPT-5.3-Codex benchmarks — Devin has no published benchmarks
| Benchmark | Description | Score |
|---|---|---|
| SWE-bench | Real GitHub issue fixing | 72% |
| HumanEval | Python code generation | 95% |
Which Should You Pick?
Pick Codex (OpenAI) if...
- ✓Easier to use (8 vs 6.5)
- ✓Better value for money (8/10)
- ✓More features (9 vs 8)
- ✓Has a free tier
Developers already paying for ChatGPT Plus who want a coding agent at no extra cost. Especially good for parallel task execution -- assign multiple bug fixes or feature branches and let Codex work them simultaneously.
Visit Codex (OpenAI)Pick Devin if...
Development teams that want to offload well-scoped tasks like bug fixes, test writing, and boilerplate code to an autonomous agent. Best when the task description is detailed and specific.
Visit DevinOur Verdict
Codex (OpenAI) edges out Devin with a 8.3 vs 7.4 overall score. Both are solid picks, but Codex (OpenAI) has the advantage in value.