Most comparison posts are feature tables. This one is different — it compares by who each tool fits, from the perspective of actually shipping products with them.
The conclusion up front: all three are excellent, and there is no wrong choice. The difference is the working style.
They differ in how you work
- Cursor — editor-first. You look at the code and fix it together with AI. Closer to "you drive, AI navigates."
- Claude Code — terminal/agent-first. You state the goal; the AI reads files, edits, tests, and reports back. Closer to "AI drives, you give directions."
- Codex — agent-first with strong cloud delegation. Tossing tasks over the wall and doing something else meanwhile feels natural.
My pick and why
I use Claude Code as my main tool, for three reasons:
- It takes whole jobs, not just edits. "Build this feature, run the tests, deploy" works as a single instruction.
- CLAUDE.md and the skill system. Project rules written once get followed every session. That structure is why I use the same tool for non-coding work too — publishing content, research, ops.
- Many days I don't read the code at all. I verify through the running product, which mixes well with non-development work.
Cursor genuinely fits better if you want to learn to code while building — seeing every change on screen is great for learning. Codex is strong when your workflow lives on GitHub and you want several delegated tasks running at once.
If you're a non-developer
My recommended order:
- Pick one. The week spent comparing tools is the most expensive week available.
- Start on a ~$20/month plan. All three have entry plans around that price. Hitting the limits is the signal you've gotten serious — upgrade then.
- Invest in process, not tools. Whatever you pick, the order stays the same: validate → smallest version → build → ship.
Common questions
Q. If I switch tools later, do I start over? No. The skill of directing work through prompts transfers almost entirely. Lock-in is weaker than it looks.
Q. Can I do this for free? At trial level, yes — but if you intend to ship something real, you need one paid plan. As the full cost breakdown shows, it's effectively your only expense.
Q. What about using several at once? People do — I sometimes run a second tool as a devil's-advocate reviewer. But that's a move for after you're fluent with one.
This is the tools chapter of the Building Apps with AI series. The 10-step process I apply on real projects is in the free kit.