I'm building a Shopify store for a client and have previously used Claude Code through the CLI in VS Code to customize the Dawn theme. It worked very well overall, although I had to correct some mistakes along the way, and I was able to finish the project on time. I'm still fairly new to development, so these tools have been extremely helpful.
My subscription has ended, and I'm considering trying Codex because its token usage may be more efficient. Since my projects are currently small and not highly paid, choosing the wrong subscription could hurt my finances. Should I try Codex for this client project, or stick with Claude, which I already know works?
4 Answers
If you want to evaluate Codex, create a development store or duplicate the theme first and give it a few small, low-risk tasks. Compare the quality of the code, how often it needs corrections, and how much time it actually saves you. Don’t learn a new tool while a client deadline is running.
For finding clients, try looking for existing Shopify stores that already have traffic but have obvious problems on mobile, product pages, or checkout. Review a batch of stores in one niche, identify one specific issue, and contact the owner with a brief explanation and a screenshot.
Positioning yourself as someone who fixes conversion problems is often more compelling than simply calling yourself a Shopify developer. You’re offering a concrete business result rather than a general skill.
Both tools can be useful, but reliability and your own familiarity matter more than token efficiency here. Use the one that already helped you deliver successfully, and make the switch only after testing it on work where mistakes won’t affect a paying client.
You’ve mostly answered your own question: Claude worked, helped you finish on time, and you already know how to guide it. A client project probably isn’t the best place to experiment with a completely different tool.
Even if Codex uses tokens more efficiently, any time spent correcting unfamiliar Liquid or theme code could easily cost more than the subscription difference. Stick with the tool you trust for this project, then test Codex later on a personal project or duplicate theme when you have more breathing room.

That makes sense. I’ll avoid experimenting on a live client project and test alternatives once I have a steadier flow of work.