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 for parallel work, and 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.
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 |
| 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 May 2026, Codex was my preferred coding agent for parallel work. By October I was flatly saying Codex was bad at the Notion build and I had to have Claude do it. Both statements were true when I said them. That's the point: test on your actual task.
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. 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.
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 and Local Media HQ podcast episodes in 2026. Last updated .