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  1. Home/
  2. Compare/
  3. OpenAI Codex Mini vs MiMo-V2-Omni
Updated Mar 2026

OpenAI Codex Mini vs MiMo-V2-Omni

MiMo-V2-Omni is cheaper than OpenAI Codex Mini at $0.4/M vs $1.5/M input tokens.

Pokémon Battle UI Recreation

Pokémon battle screen you can actually click. One HTML file.

Loading the build
OpenAI Codex Mini
Loading the build
MiMo-V2-Omni

Which answer wins?

Written rounds

2 prompts
  • 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.

    MiMo-V2-Omni: Here are 5 jokes for you: 1. Why don't scientists trust atoms? Because they make up everything! 2. Knock knock. Who's there? Lettuce. Lettuce who? Lettuce in, it's cold out here! 3. I told my wife she was drawing her eyebrows too high. She looked surprised. 4. What do you call a fake noodle? An impasta! 5.

    Every model's answer to this prompt
  • 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.

    MiMo-V2-Omni: (Adjusts mic, looks around with a friendly smile) Hey everyone! How we doing tonight? Good? Good. I’ve been trying to be more “present” lately. You know, put my phone away, look at the world. It’s terrifying. The world is in 4K with no filter.

    Every model's answer to this prompt

Price and specs

Not enough votes to call it. On the specs, MiMo-V2-Omni has the edge: bigger model tier, newer. MiMo-V2-Omni costs 3.0x less per token.

OpenAI Codex Mini and MiMo-V2-Omni compared across 10 shared prompts
SpecOpenAI Codex MiniMiMo-V2-Omni
Input price$1.5/M tokens$0.4/M tokens
Output price$6/M tokens$2/M tokens
Context window200K tokens262K tokens
Free API (OpenRouter)NoNo
ReleasedMay 2025Mar 2026
At 10M a month$15.00$15.00$4.00$4.00
1M10M100M1B10M tokens

Input tokens at list price. No caching, no batch discount.

Common questions

What is the difference between OpenAI Codex Mini and MiMo-V2-Omni?

OpenAI Codex Mini is developed by OpenAI while MiMo-V2-Omni is developed by Xiaomi. OpenAI Codex Mini has a 200K token context window vs MiMo-V2-Omni'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 MiMo-V2-Omni?

It depends on your use case. OpenAI Codex Mini and MiMo-V2-Omni 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 OpenAI Codex Mini cost compared to MiMo-V2-Omni?

OpenAI Codex Mini costs $1.5/M input tokens and MiMo-V2-Omni costs $0.4/M input tokens. MiMo-V2-Omni is $1.10/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 OpenAI Codex Mini and MiMo-V2-Omni on Rival?

This page shows a side-by-side comparison of OpenAI Codex Mini and MiMo-V2-Omni 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.

More comparisons

Against the newest arrivals

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  • OpenAI Codex Mini vs Solar Mini 4Landed Sep 2026
  • MiMo-V2-Omni vs Qwen3.8 Max PrimeLanded Sep 2026

Same lab, same size, long tail

  • OpenAI Codex Mini vs GPT-6 Luna ProSame lab
  • OpenAI Codex Mini vs GPT-6 Sol ProSame lab
  • MiMo-V2-Omni vs MiMo-V2.6-ProSame lab
  • MiMo-V2-Omni vs MiMo-V2.6-FlashSame lab
  • MiMo-V2-Omni vs DeepSeek V3.2 SpecialeSame size
  • OpenAI Codex Mini vs DeepSeek V4 FlashNew provider
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  • OpenAI Codex Mini vs DeepSeek V4 Flash Vision ExpNew provider

Model pages

  • OpenAI Codex Mini10 outputs, specs and price
  • MiMo-V2-Omni53 outputs, specs and price
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