Claude vs ChatGPT vs Codex: which AI should I use?
Short answer
Use more than one, but pick one per job and stick with it. In mid-2026 I told companies ChatGPT was ahead for general use, yet consistency beats chasing the leader. For coding I lean on Codex because it works longer on its own and asks me for less, and on Claude for design-heavy builds and Notion. One AI coding tool per project.
I pay for both Claude and ChatGPT, and I tell every business owner to do the same. But when a company asks me which one to standardize on, my answer has less to do with which model is smartest this month and more to do with picking one and staying put.
Which is better for general business use?
When corporate clients asked me in May and June 2026, I said ChatGPT was ahead of Claude for general use, even though Claude was getting the stronger business press. Then I told them that doesn't really matter.
"A company shouldn't keep switching platforms. Stay consistent on one and teach general use before layering in shared infrastructure."
The order I recommend for a team: pick one platform, teach people to use it well on their own, and only then build shared team systems on top. Switching every time a new model tops a leaderboard resets everyone's habits for a small gain. A co-founder I worked with compared chasing every frontier upgrade to incremental phone camera improvements. Diminishing returns.
Reliability counts, too. In January 2026 I said one of Claude's big downsides was that it broke a lot more than ChatGPT for me. It would just shut down, things wouldn't work, and I hit its usage limit every day around 4 or 5 p.m.
Is Codex or Claude Code better for coding?
It depends on the job, and my answer has changed over time.
| Job | What I reached for |
|---|---|
| Parallel coding workstreams (mid-2026) | Codex |
| Dashboard pulling Meta ads data from nine ad accounts plus Beehiiv stats | Codex, in one attempt, after Claude Code failed at the same task |
| Setting up and operating my own software | Codex, with its in-app browser |
| Rebuilding my CRM and client portals in Notion (October 2026) | Claude. Codex was bad at it. |
| Design-heavy pages | Claude's top model (Opus). Its designs were far better than Sonnet's. |
In spring 2026 I said on my podcast that Codex was crushing Claude for me. Codex seemed willing to work a lot longer and solve more problems on its own. Claude kept coming back to me: I couldn't figure this out, I stopped here. Codex just said okay, I'll tell you when I'm done. It wasn't perfect, and I expected Claude might catch up.
The thing that drove me nuts as a non-technical user was being handed work. Claude Code kept asking me to run things in the terminal and edit docs. Codex didn't ask me for those things. I told Claude Code flatly: just do it, take over my browser if you have to, or I'm going to Codex.
By October I was flatly saying Codex was bad at the Notion build and I had to have Claude do it. Every one of these statements was true when I said it. That's the point: test on your actual task.
Can an agent run software I don't know how to use?
Yes, and this is where Codex has impressed me most. I don't even know how to use my own survey software. When I launched a new market, I told Codex I wanted everything from one city's setup copied into the new one, same order, same everything, with a different city question. It came back about three minutes later and said done.
Its in-app browser is way better than Claude's for this, in my experience. Say "open this website and let's work on it together." It doesn't have to be your software. You could open Stripe and say: I don't know how to use Stripe, help me do this. It's even better with software you built, because the same agent can build the tool and operate it.
Can I use Codex and Claude Code on the same project?
You can, because the code lives in GitHub and both tools just read and change the same files. I think of them as two developers working from the same repository, and the repository holds the rules for how we build.
Even so, I stick with one AI coding tool per project. Switching mid-project causes context and memory issues: one tool doesn't know what the other was thinking. Pick one, finish, then reconsider.
Where does ChatGPT fit if I code with Claude?
- A second opinion on big plans. For large builds, one model writes the plan and ChatGPT's top model, on high effort, redlines it before anything gets built. More in plan with one AI, build with another.
- Planning chat vs. builder. I've used Claude chat as my product manager and Claude Code as the developer. It's almost silly because it's the same thing, but splitting the roles works.
Should a non-technical business owner try Codex?
Yes. If you're a real business person, test it. It takes about 15 minutes to get used to working in folders, which is a little confusing at first, then it clicks. You can test it on the $20 plan, though you'll get cut off quickly.
Don't let the word code scare you. You don't need to learn another language. Think of Claude Code or Codex as AI agents that do things for you. I call it the future of work, and I mean that for media brands, websites, social content and anyone running an agency on the back end.
Where it's going is a super app, and Codex is already ahead of Claude on it: your chats on the left, the conversation with your agent in the middle, and the biggest screen on the right showing the website or app you're working on. The bigger play after that is voice. You just talk to your agent and it moves the button for you, no keyboard and mouse.
When I went heavier, I jumped to the $200 a month Codex plan and used 80% of it in 36 hours. Know your usage before you commit. I cover that in how to cut AI costs.
Answered by TJ Larkin. From client calls, team calls, Local Media HQ and AI Off Leash podcast episodes and my own notes to my AI agents, 2026. Last updated .