Codex (OpenAI) vs ChatGPT
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
ChatGPT
The chatbot that started the AI revolution -- most popular AI assistant in the world
| Category | Codex (OpenAI) | ChatGPT |
|---|---|---|
| Ease of Use | 8.0 | 10.0 |
| Output Quality | 8.0 | 8.0 |
| Value | 8.0 | 8.0 |
| Features | 9.0 | 9.0 |
| Overall | 8.3 | 8.8 |
Pricing Comparison
| Feature | Codex (OpenAI) | ChatGPT |
|---|---|---|
| Free Tier | Yes | Yes |
| Starting Price | $0 | $0 |
Benchmark Head-to-Head
GPT-5.3-Codex vs GPT-5.4
| Benchmark | Codex (OpenAI) | ChatGPT |
|---|---|---|
| SWE-bench | 72% | 72% |
| HumanEval | 95% | 95% |
Which Should You Pick?
Pick Codex (OpenAI) if...
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 ChatGPT if...
- ✓Easier to use (10 vs 8)
Everyone. Seriously -- if you're new to AI or want the most complete all-in-one package, ChatGPT is the default recommendation.
Visit ChatGPTOur Verdict
ChatGPT edges out Codex (OpenAI) with a 8.8 vs 8.3 overall score. Both are solid picks, but ChatGPT has the advantage in features.