Devin vs Codex (OpenAI)
Which one should you pick? Here's the full breakdown.
Devin
The most autonomous AI coding agent -- it researches, plans, writes code, and tests it without hand-holding
Powered by Multiple models (proprietary orchestration)
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
| Category | Devin | Codex (OpenAI) |
|---|---|---|
| Ease of Use | 6.5 | 8.0 |
| Output Quality | 8.0 | 8.0 |
| Value | 7.0 | 8.0 |
| Features | 8.0 | 9.0 |
| Overall | 7.4 | 8.3 |
Pricing Comparison
| Feature | Devin | Codex (OpenAI) |
|---|---|---|
| Free Tier | No | Yes |
| Starting Price | $20 | $0 |
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 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 DevinPick 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)Our 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.