OpenAI Codex Mini vs 
NVIDIA Nemotron 3 Super (free)
NVIDIA Nemotron 3 Super (free) has a larger context window than OpenAI Codex Mini (262K tokens vs 200K tokens).
Pokémon Battle UI Recreation
Pokémon battle screen you can actually click. One HTML file.
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Which answer wins?
Written rounds
2 promptsThree 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.
NVIDIA Nemotron 3 Super (free): (Lights up. Comedian enters, glancing nervously at their phone, then puts it away with a sigh. Starts with energetic, relatable frustration.) You know what’s wild? How we’ve all become *zombies*—but not the cool, movie-zombie kind. No, we’re the phone-zombie kind.
Five 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.
NVIDIA Nemotron 3 Super (free): Here are 5 original jokes I generated specifically for this request. Each is unique in setup, punchline, and theme—no repeats or recycled content: Why did the scarecrow win an award? Because he was outstanding in his field. (Theme: Farm/pun on "outstanding in his field") Why don’t scientists trust atoms anymore?
Price and specs
Not enough votes to call it. On the specs, NVIDIA Nemotron 3 Super (free) has the edge: bigger model tier, newer.
| Spec | OpenAI Codex Mini | NVIDIA Nemotron 3 Super (free) |
|---|---|---|
| Input price | $1.5/M tokens | — |
| Output price | $6/M tokens | — |
| Context window | 200K tokens | 262K tokens |
| Parameters | Not disclosed | 12B active (120B total) |
| Weights | — | Open |
| Free API (OpenRouter) | No | Yes (1 provider) |
| Released | May 2025 | Mar 2026 |
| At 10M a month | $15.00 | not listed |
Input tokens at list price. No caching, no batch discount.
Where to run it
OpenAI Codex Mini
No hosts listed on OpenRouter.
NVIDIA Nemotron 3 Super (free)1 host
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
Common questions
What is the difference between OpenAI Codex Mini and NVIDIA Nemotron 3 Super (free)?
OpenAI Codex Mini is developed by OpenAI while NVIDIA Nemotron 3 Super (free) is developed by NVIDIA. OpenAI Codex Mini has a 200K token context window vs NVIDIA Nemotron 3 Super (free)'s 262K. 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 NVIDIA Nemotron 3 Super (free)?
It depends on your use case. OpenAI Codex Mini and NVIDIA Nemotron 3 Super (free) 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 NVIDIA Nemotron 3 Super (free) on Rival?
This page shows a side-by-side comparison of OpenAI Codex Mini and NVIDIA Nemotron 3 Super (free) 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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