Aurora Alpha vs 
OpenAI Codex Mini
Aurora Alpha is cheaper than OpenAI Codex Mini at $0/M vs $1.5/M input 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 promptsFive jokes on demand, then count how many were actually different.
Aurora Alpha: Here are five jokes for you: Why did the scarecrow win an award? Because he was outstanding in his field! What do you call fake spaghetti? An impasta. Why don’t scientists trust atoms? Because they make up everything. How does a penguin build its house? Igloos it together. What’s orange and sounds like a parrot?
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.
Three minutes of stand-up. Puns are banned.
Aurora Alpha: [Opening – 0:00‑0:30] Hey, everyone! Great to see you all here tonight. I just got back from a week of “working from home,” which is a fancy way of saying my cat now thinks I’m a permanent fixture on the couch.
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.
Price and specs
| Spec | Aurora Alpha | OpenAI Codex Mini |
|---|---|---|
| Input price | Free | $1.5/M tokens |
| Output price | Free | $6/M tokens |
| Context window | 128K tokens | 200K tokens |
| Free API (OpenRouter) | No | No |
| Released | Feb 2026 | May 2025 |
| At 10M a month | $0 | $15.00 |
Input tokens at list price. No caching, no batch discount.
Common questions
What is the difference between Aurora Alpha and OpenAI Codex Mini?
Aurora Alpha is developed by OpenRouter while OpenAI Codex Mini is developed by OpenAI. Aurora Alpha has a 128K token context window vs OpenAI Codex Mini's 200K. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.
Which is better, Aurora Alpha or OpenAI Codex Mini?
It depends on your use case. Aurora Alpha and OpenAI Codex Mini 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 much does Aurora Alpha cost compared to OpenAI Codex Mini?
Aurora Alpha costs $0/M input tokens and OpenAI Codex Mini costs $1.5/M input tokens. Aurora Alpha is $1.50/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.
How can I compare Aurora Alpha and OpenAI Codex Mini on Rival?
This page shows a side-by-side comparison of Aurora Alpha and OpenAI Codex Mini 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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