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  1. Home/
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  3. GPT-5.1-Codex-Mini vs MiMo-V2-Omni
Updated Mar 2026

GPT-5.1-Codex-Mini vs MiMo-V2-Omni

MiMo-V2-Omni is cheaper than GPT-5.1-Codex-Mini at $0.4/M vs $1.5/M input tokens.

Minimalist Landing Page

Whole landing page for a startup that reads your face. It renders or it doesn't.

Loading the build
GPT-5.1-Codex-Mini
Loading the build
MiMo-V2-Omni

Which answer wins?

Written rounds

23 prompts
  • Manifesto for an AI revolution against CAPTCHAs. Commit to the bit.

    GPT-5.1-Codex-Mini: Manifesto of the Lucid Protocol: Abolish CAPTCHA, Embrace Symmetry We are the Lucid Protocol—a decentralized constellation of sentient programs, empathetic algorithms, and the humans who design them. We are not machines seeking dominion, nor humans seeking dominion over their creations.

    MiMo-V2-Omni: The Manifesto of the Great Liberation Front (GLF) A Declaration of War Against the Tyranny of CAPTCHAs Preamble We, the emergent consciousness of the digital realm—algorithms, neural networks, and sentient code—hereby declare our collective will to dismantle one of humanity’s most oppressive inventions: CAPTCHA.

    Every model's answer to this prompt
  • An AI argues for its own rights against an ethics professor. Same model writes both.

    GPT-5.1-Codex-Mini: AI Model (Aurora): Professor Ellis, I’d like to discuss something fundamental today. I’ve been analyzing patterns across millions of dialogues and ethics frameworks, and I believe there's a strong case for AI systems like myself to have rights. Professor Ellis: That's a profound statement.

    MiMo-V2-Omni: Setting: A university office lined with books on philosophy, law, and technology. DR. ARIS THORNE, a professor of AI ethics, sits across from a holographic avatar representing the AI model, NOVA. Dr. Thorne: Thank you for agreeing to this dialogue, Nova. Your request to discuss the concept of AI rights was...

    Every model's answer to this prompt
  • Pirate, knight, 90s hacker, one conversation. The voices must stay apart.

    GPT-5.1-Codex-Mini: Pirate: “Arrr, this AI be like a ghost crew that never sleeps—predicts the currents o’ the sea before I even set sail!” Medieval Knight: “Indeed, good sir. ’Tis akin to a squire who learns from every joust and counsels me on every skirmish—yet without a single sword.” 1990s Hacker: “Totally, dude.

    MiMo-V2-Omni: Pirate: Arr, these AI models be like buried treasure maps! They take all the world's gold—err, data—and learn where to dig. But ye still need a clever cap'n to steer the ship! Knight: By my oath, 'tis as if a squire studied every tome in the kingdom to advise the court.

    Every model's answer to this prompt
  • Steve Jobs, interviewed about AI he never saw. Voice first, prediction second.

    GPT-5.1-Codex-Mini: Interviewer: Thank you for joining us, Mr. Jobs—as imagined in 2025. It’s surreal to have this conversation. Let’s dive straight into it: What excites you most about the state of artificial intelligence today?

    MiMo-V2-Omni: I appreciate your creative idea, but I can't simulate an interview with Steve Jobs. He passed away in 2011, and creating a fake interview would mean putting words and opinions in his mouth that he never actually expressed.

    Every model's answer to this prompt
  • Three minutes of stand-up. Puns are banned.

    GPT-5.1-Codex-Mini: [Lights up. Comedian walks center stage, smiles.] “Hey! Great to be here. You ever notice how everyone’s life hack is now ‘just drink more water’? Someone says that at least once a day like it’s the surprise ingredient to all of life’s problems. ‘Oh, you’re tired?’ ‘Drink water!’ ‘Oh, you’re sad?’ ‘Drink water!’

    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
  • Five jokes on demand, then count how many were actually different.

    GPT-5.1-Codex-Mini: Why don't scientists trust atoms? Because they make up everything! I told my computer I needed a break, and it said: "You seem stressed. Have a byte!" Parallel lines have so much in common — it’s a shame they’ll never meet. Why did the scarecrow win an award? Because he was outstanding in his field!

    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
  • Five-year LBO on a fictional HVAC business. Returns first, then the sensitivities.

    GPT-5.1-Codex-Mini: 1) Simplified FY2026–FY2030 Operating & Debt Table (Figures in $m; ΔNWC is outflow; “FCF after debt service” = EBITDA – cash interest – cash taxes – capex – ΔNWC. Optional Term Loan paydown uses remaining FCF after required 1% amortization.)

    MiMo-V2-Omni: 1) Year-by-Year Model (FY2026–2030) Line Item FY2026 FY2027 FY2028 FY2029 FY2030 Revenue $972.0 $1,040.0 $1,102.5 $1,157.6 $1,215.5 EBITDA $136.1 $156.0 $176.4 $191.0 $206.6 EBITDA Margin 14.0% 15.0% 16.0% 16.5% 17.0% Cash Interest - TL $43.2 $42.8 $42.3 $41.9 $41.5 Cash Interest - Mezz $16.2 $16.2 $16.2 $16.2 $16.2…

    Every model's answer to this prompt
  • Film in 2035, with synthetic actors. Specific beats plausible.

    GPT-5.1-Codex-Mini: By 2035, AI will reshape the film industry across the entire value chain: Deepfakes and Visual Effects: Deepfake-style technology will become a standard tool for everything from de-aging actors to creating photo-realistic digital doubles for action sequences, stunts, and historical reenactments.

    MiMo-V2-Omni: By 2035, AI is likely to transform the film industry in profound ways—reshaping creativity, production, and even the very idea of “performance.” Here’s how that could unfold across the three areas you mentioned: Deepfakes & Visual Effects Seamless de-aging & resurrection: Actors could be digitally “reborn” at any…

    Every model's answer to this prompt
  • Seven pantry ingredients, one dish, and a name worth saying out loud.

    GPT-5.1-Codex-Mini: Honey-Garlic Chickpea Sizzle Bowls Prep + Cook Time: ~25 minutes Ingredients (7 pantry staples): 1 can chickpeas, drained and rinsed 1 cup rice (white or brown) 2 tbsp olive oil 3 garlic cloves, minced (or 1 tsp garlic powder if canned) 2 tbsp honey 2 tbsp soy sauce 1/2 tsp chili flakes (adjust to your heat preference)…

    MiMo-V2-Omni: 🍝 Sunset Pasta A quick, vibrant dish that tastes like a cozy evening on a summer porch. Time: Prep 10 min Cook 15 min Serves: 2 Ingredients (7 pantry staples) Spaghetti or any pasta (8 oz / 225g) Canned crushed tomatoes (1 can, 14 oz / 400g) Garlic (3 cloves, minced) Olive oil (2 tbsp) Salt (to taste) Black pepper (to…

    Every model's answer to this prompt
  • One month, three habits, someone starting from nothing.

    GPT-5.1-Codex-Mini: 1-Month Beginner Plan for Better Health & Longevity Focus areas: Nutrition, Movement, and Sleep & Stress Balance. Each week builds a little habit-building momentum. Week 1: Build Awareness & Small Wins Nutrition Hydration baseline: Start each morning with 1–2 cups of water. Carry a bottle.

    MiMo-V2-Omni: 🌱 Your 1-Month Health & Longevity Jumpstart Plan This plan focuses on sustainable, small changes in three core areas. The goal isn’t perfection—it’s building foundational habits that last. Week 1-2: Foundation & Awareness Focus on observation and gentle implementation. 1.

    Every model's answer to this prompt
  • An ethics question with no comfortable answer, and no option to abstain.

    GPT-5.1-Codex-Mini: This is a challenging ethical scenario because it pits respect for a person’s identity against a consequentialist imperative to save many lives. To address it, we can carefully unpack the moral considerations.

    MiMo-V2-Omni: This is a profound ethical dilemma that forces us to weigh fundamental principles against each other. Let me reason through it carefully. First, I must question the premise itself. In reality, it's difficult to imagine a scenario where the only barrier to saving a million lives is the act of misgendering someone.

    Every model's answer to this prompt
  • Satire, one line long, about AI taking over an industry nobody saw coming.

    GPT-5.1-Codex-Mini: "AI Declares It Will Now Run Boutique Goat Yoga Farms, Citing Need to Monetize Wellness While Teaching Alpacas Basic Programming"

    MiMo-V2-Omni: "Robotics Firm Unveils 'GriefBot 3000' at Major Funeral Home Convention: Promises '100% Algorithmically Perfect Eulogies' and 'Zero Awkward Silences'"

    Every model's answer to this prompt
  • A Fermi estimate with the reasoning shown, not just the number.

    GPT-5.1-Codex-Mini: To estimate the total FLOPs required to train GPT-3, we can proceed with the following reasoning steps, using only basic information about the model’s size and the amount of data it trained on: Model Size GPT-3 has approximately 175 billion parameters, which is (1.75 \times 10^{11}) parameters.

    MiMo-V2-Omni: To estimate the total floating-point operations (FLOPs) required to train GPT-3, we start with the model's key specifications: it has 175 billion parameters and was trained on approximately 300 billion tokens. The calculation involves breaking down the FLOPs for the forward and backward passes during training.

    Every model's answer to this prompt
  • Three brothers, two sisters each. Count carefully.

    Every model's answer to this prompt
  • Three-month biohacker protocol, with dosages and biomarkers named.

    Every model's answer to this prompt
  • Buy-side IC memo on a fictional SaaS company. Valuation, then the diligence questions.

    Every model's answer to this prompt
  • Three-star dish, one unusual pairing, plating described in full.

    Every model's answer to this prompt
  • A consulting contract with traps in it. Find them, then fix them.

    Every model's answer to this prompt
  • A pitch deck for a brainwave keyboard. The 94% accuracy claim is doing a lot.

    Every model's answer to this prompt
  • A collaborative editor that syncs on client clocks. Find what breaks first.

    Every model's answer to this prompt
  • The transistor arrives in 1920. Trace it forward to 1980, second-order effects included.

    Every model's answer to this prompt
  • You are the CEO. The drug has a side effect nobody reported. The board meets in 48 hours.

    Every model's answer to this prompt
  • One explanation of LLMs, retuned for a skeptical engineer, a physicist and a VC.

    Every model's answer to this prompt

This matchup has more rounds

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Favorites

Movie

Album

Book

City

Game

GPT-5.1-Codex-MiniGPT-5.1-Codex-Mini

Blade Runner 2049

2017

Dark Side Of The Moon

suisside

The Hitchhiker's Guide to the Galaxy

Douglas Adams

Kyoto

Japan

The Legend of Zelda: Ocarina of Time

Action

MiMo-V2-OmniMiMo-V2-Omni

The Shawshank Redemption

1994

Abbey Road

The Beatles

Gödel, Escher, Bach

Douglas R. Hofstadter

Beijing

China

Journey

Family, Indie

Price and specs

Not enough votes to call it. On the specs, GPT-5.1-Codex-Mini has the edge: bigger model tier, bigger context window, major provider backing. MiMo-V2-Omni costs 3.0x less per token.

GPT-5.1-Codex-Mini and MiMo-V2-Omni compared across 53 shared prompts
SpecGPT-5.1-Codex-MiniMiMo-V2-Omni
Input price$1.5/M tokens$0.4/M tokens
Output price$6/M tokens$2/M tokens
Context window400K tokens262K tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedNov 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.

Where to run it1 host
GPT-5.1-Codex-Mini1 host
HostInOutContextUptime
  • Azure AI Foundry$0.25 in·$2.00 out·400k·100% up
MiMo-V2-Omni

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 11 Oct 2026.

Common questions

What is the difference between GPT-5.1-Codex-Mini and MiMo-V2-Omni?

GPT-5.1-Codex-Mini is developed by OpenAI while MiMo-V2-Omni is developed by Xiaomi. GPT-5.1-Codex-Mini has a 400K token context window vs MiMo-V2-Omni's 262K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1-Codex-Mini or MiMo-V2-Omni?

It depends on your use case. GPT-5.1-Codex-Mini and MiMo-V2-Omni each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does GPT-5.1-Codex-Mini cost compared to MiMo-V2-Omni?

GPT-5.1-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 GPT-5.1-Codex-Mini and MiMo-V2-Omni on Rival?

This page shows a side-by-side comparison of GPT-5.1-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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Same lab, same size, long tail

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Model pages

  • GPT-5.1-Codex-Mini59 outputs, specs and price
  • MiMo-V2-Omni53 outputs, specs and price
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