OpenAI Codex Mini vs 
TNG R1T Chimera
TNG R1T Chimera is the newer model, released after OpenAI Codex Mini.
Pokémon Battle UI Recreation
Pokémon battle screen you can actually click. One HTML file.
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Which answer wins?
Written rounds
2 promptsFive jokes on demand, then count how many were actually different.
OpenAI Codex Mini: Sure—here are five jokes: I asked the librarian if books about paranoia were available. She whispered, "They're right behind you." Why did the tomato turn red? Because it saw the salad dressing. I bought a boat because it was for sail. Don't trust stairs—they're always up to something.
TNG R1T Chimera: Here are 5 jokes: Why don’t skeletons fight each other? They don’t have the guts. What do you call fake spaghetti? An impasta. Why did the scarecrow win an award? Because he was outstanding in his field. How does a penguin build its house? Igloos it together. Why don’t eggs tell jokes? They’d crack up.
Three minutes of stand-up. Puns are banned.
OpenAI Codex Mini: [Comedian walks onstage] Hey, everyone! Great to see you all tonight. I'm Jamie—if you thought that intro was enthusiastic, you should've seen me when I realized this place has Wi-Fi. Seriously, though, I love stand-up.
TNG R1T Chimera: 3-Minute Stand-Up Comedy Routine: “Modern Life is… Something” [Open with confident energy, like you’re already mid-conversation.] You ever notice how optimistic technology is? Like, my smart speaker wakes me up every morning with, “Good news! Today will be sunny!”
Price and specs
Not enough votes to call it. On the specs, TNG R1T Chimera has the edge: bigger model tier, newer.
| Spec | OpenAI Codex Mini | TNG R1T Chimera |
|---|---|---|
| Input price | $1.5/M tokens | — |
| Output price | $6/M tokens | — |
| Context window | 200K tokens | — |
| Free API (OpenRouter) | No | No |
| Released | May 2025 | Nov 2025 |
| At 10M a month | $15.00 | not listed |
Input tokens at list price. No caching, no batch discount.
Common questions
What is the difference between OpenAI Codex Mini and TNG R1T Chimera?
OpenAI Codex Mini is developed by OpenAI while TNG R1T Chimera is developed by OpenRouter. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.
Which is better, OpenAI Codex Mini or TNG R1T Chimera?
It depends on your use case. OpenAI Codex Mini and TNG R1T Chimera each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.
How can I compare OpenAI Codex Mini and TNG R1T Chimera on Rival?
This page shows a side-by-side comparison of OpenAI Codex Mini and TNG R1T Chimera across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.
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Same lab, same size, long tail
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