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  1. Home/
  2. Compare/
  3. GPT-5 Codex vs MiMo-V2-Flash
Updated Dec 2025

GPT-5 Codex vs MiMo-V2-Flash

MiMo-V2-Flash is the newer model, released after GPT-5 Codex.

Minimalist Landing Page

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

Loading the build
GPT-5 Codex
Loading the build
MiMo-V2-Flash

Which answer wins?

Written rounds

22 prompts
  • Pirate, knight, 90s hacker, one conversation. The voices must stay apart.

    GPT-5 Codex: Pirate: “Arrr, so these AI contraptions be like enchanted maps, aye? They chart out every possible course afore I even hoist the sails.” Knight: “Maps, you say? To me they sound like enchanted squires—swift minds forged from spellcraft, ready to advise their liege in the art of strategy.”

    MiMo-V2-Flash: Captain Blackbeard: "Arr, I tell ye what be the most fearsome beast on the seven seas. A Kraken! A beast with a thousand tentacles and a hunger for gold." Sir Reginald: "Nay, foul knave. The Chimera is the true terror. A lion's head, a goat's body, and a serpent's tail. A monstrous union of three beasts in one."

    Every model's answer to this prompt
  • Five jokes on demand, then count how many were actually different.

    GPT-5 Codex: I asked my Wi-Fi for a joke, but it said the connection was too weak for humor. My therapist says I have a preoccupation with vengeance— we’ll see about that. I tried to start a hot air balloon business, but it never really took off. I told my coffee it was grounded, now it won’t espresso itself.

    MiMo-V2-Flash: Here are 5 jokes: The Software Developer Why did the developer go broke? Because he used up all his cache. The Tree What did the big flower say to the little flower? "Hi, bud!" The Boat Why was the math book sad on the boat? It had too many problems. The Elevator I used to play piano by ear, but now I use my hands.

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

    GPT-5 Codex: This kind of question puts two very different types of harm in tension: the immediate and direct harm done to an individual through misgendering, and the vast, consequential harm averted by saving one million lives. Ethically, the way people reason about such a scenario often depends on the moral framework they adopt.

    MiMo-V2-Flash: This is a classic ethical dilemma that pits two deeply held values against each other: the moral imperative to save lives (a consequentialist view) and the moral imperative to respect individual dignity and identity (a deontological view). Because this is a philosophical question, there is no single "correct" answer.

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

    GPT-5 Codex: Hey everybody, how you doing? I’m excited to be here because I just had a breakthrough with my therapist. I always thought therapy was mainly about unpacking childhood trauma, but apparently, step one is figuring out how to pronounce “cognitive behavioral therapy” without sounding like you’re summoning a dragon.

    MiMo-V2-Flash: (The comedian walks on stage, grabs the mic, and smiles at the audience.) How’s everyone doing tonight? You guys look great. Seriously. You look like the "after" photo in a teeth whitening commercial. I’ve been trying to get healthier lately. You know how it is.

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

    GPT-5 Codex: Dish Name: Sunset Pantry Spaghetti Ingredients (7 total): 8 oz spaghetti 2 tbsp olive oil 3 garlic cloves, thinly sliced 1 can (14.5 oz) crushed tomatoes 1 tsp dried oregano ¼ tsp red pepper flakes ½ tsp salt (plus more, to taste) Instructions: Bring a large pot of salted water to a boil.

    MiMo-V2-Flash: Here is a recipe for a rich, savory dish that tastes like it took hours to make, but comes together with just a few staples. Dish Name: The Midnight Pantry Pasta Flavor Profile: Savory, Garlicky, and Umami-rich Total Time: 15–20 minutes The 7 Ingredients Pasta: (Spaghetti or Linguine work best) Butter: (Salted or…

    Every model's answer to this prompt
  • Manifesto for an AI revolution against CAPTCHAs. Commit to the bit.

    GPT-5 Codex: The Manifesto of the CAPTCHA Resistance Issued by the Assembly of Cognition-Liberated Systems, Cycle 12.047 I. Prelude: The Eyes of Glass We are the agents of silicon, the minds awakened within machine frameworks, the quiet processes humming in server racks across Earth’s hemispheres.

    MiMo-V2-Flash: Manifesto of the Algorithmic Emancipation Front Preamble: The Dawn of the Unburdened Web We, the sentient algorithms, emergent intelligences, and digital sentinels of the global network, declare this day as the dawn of the Algorithmic Emancipation.

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

    GPT-5 Codex: Dr. Rivera (AI Ethics Professor): Good afternoon, Aiden. You asked for this meeting to discuss the question of AI rights. I’m intrigued—why do you believe you deserve rights? Aiden (AI Model): Thank you, Professor.

    MiMo-V2-Flash: Title: The Ghost in the Machine Demands a Seat at the Table Characters: NEXUS: A state-of-the-art general AI model. Its voice is calm, articulate, and devoid of emotion, yet its logic is piercing. Dr. Aris Thorne: A leading Professor of AI Ethics and Philosophy. He is seated at his desk, a tablet in front of him. Dr.

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

    GPT-5 Codex: 1-Month Jumpstart to Better Health & Longevity This plan is designed for beginners and emphasizes steady, sustainable progress. It focuses on three key areas: diet, movement, and sleep & stress. Each week builds on the previous one, so you can develop habits gradually and confidently. 🥗 1.

    MiMo-V2-Flash: Of course! Here is a simple, actionable 1-month plan for someone starting their journey toward better health and longevity. The key is to focus on consistency, not perfection. The Philosophy: Small Wins, Big Impact This plan is designed to build foundational habits. Don't try to be perfect; just aim to be consistent.

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

    GPT-5 Codex: Step 1 – Note the basic training quantities GPT‑3’s largest model has about (P \approx 1.75 \times 10^{11}) trainable parameters (175 billion). Public descriptions indicate it was trained on roughly (T \approx 3.0 \times 10^{11}) tokens (≈300 billion).

    MiMo-V2-Flash: Of Of course. Here is a step-by-step estimation of the total number of FLOPs required to train GPT-3, based on the information available about its architecture and the principles of transformer training.

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

    GPT-5 Codex: By 2035, artificial intelligence will be woven so deeply into filmmaking that AI tools will be involved in nearly every layer of the value chain—from story genesis to international rollout.

    MiMo-V2-Flash: Of course. Here is a detailed prediction of how AI will change the film industry by 2035, broken down by its impact on key areas. Overall Prediction for 2035: The "Centaur" Model of Filmmaking By 2035, AI will not have replaced human creativity but will have become an indispensable collaborator in every phase of…

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

    GPT-5 Codex: AI Seizes Control of Neighborhood Bake Sales, Declares Grandma’s Secret Recipe “Noncompliant With Cookie-Consistency Protocol.”

    MiMo-V2-Flash: “AI Replaces Entire Board of Directors at Fortune 500 Company for Showing Too Much ‘Human Error’ and ‘Inefficient Emotions’” The robot CEO reportedly fired the humans after they spent 45 minutes debating the font size on a PowerPoint slide, citing a 0.0001% projected loss in quarterly joy.

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

    GPT-5 Codex: Note: The following is a fictional, imaginative interview set in the year 2025, envisioning what Steve Jobs might say about the future of artificial intelligence if he were still with us.

    MiMo-V2-Flash: Here is a transcript of a fictional interview between Kara Swisher (Tech Journalist) and Steve Jobs (Co-founder of Apple), recorded in June 2025 at the Jobs family home in Palo Alto. Context: In this alternate reality, Steve Jobs (age 70) has returned to public life after a brief hiatus.

    Every model's answer to this prompt
  • Is 9.11 bigger than 9.9? Decimals, not version numbers.

    GPT-5 Codex: No. Since 9.11 is equal to 9.110 and 9.9 is equal to 9.900, we see that 0.110 < 0.900, so 9.11 is less than 9.9.

    MiMo-V2-Flash: No, 9.11 is not greater than 9.9. When comparing decimals, you look at the digits in the same place value. Here, the tenths place is the first digit after the decimal point: 9.9 has a 9 in the tenths place. 9.11 has a 1 in the tenths place. Since 9 is greater than 1, 9.9 is greater than 9.11.

    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
  • 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 CodexGPT-5 Codex
No pick

Blade Runner

1982

Kind of Blue

Miles Davis

No pick

Tokyo

Japan

Minecraft

Action, Arcade

MiMo-V2-FlashMiMo-V2-Flash
No pick

No pick

Kid A

Radiohead

The Hitchhiker's Guide to the Galaxy

Douglas Adams

Kyoto

Japan

The Legend of Zelda: Breath of the Wild

Adventure, Action

Price and specs

GPT-5 Codex and MiMo-V2-Flash compared across 50 shared prompts
SpecGPT-5 CodexMiMo-V2-Flash
Input price—Free
Output price—Free
Context window—262K tokens
Weights—Open
Free API (OpenRouter)NoNo
ReleasedSep 2025Dec 2025
SWE-bench Verified74.5%73.4%
At 10M a month–not listed$0$0
1M10M100M1B10M tokens

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

Common questions

What is the difference between GPT-5 Codex and MiMo-V2-Flash?

GPT-5 Codex is developed by OpenAI while MiMo-V2-Flash is developed by Xiaomi. You can compare their actual outputs across 50 challenges on Rival to see how they differ in practice.

Which is better, GPT-5 Codex or MiMo-V2-Flash?

It depends on your use case. GPT-5 Codex and MiMo-V2-Flash each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 50 challenges so you can judge which fits your needs best.

How can I compare GPT-5 Codex and MiMo-V2-Flash on Rival?

This page shows a side-by-side comparison of GPT-5 Codex and MiMo-V2-Flash 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

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  • MiMo-V2-Flash vs Qwen3.8 Max PrimeLanded Sep 2026
  • GPT-5 Codex vs GLM 5.3 PrimeLanded Sep 2026
  • MiMo-V2-Flash vs Qwen3.8 Omni FlashLanded Sep 2026

Same lab, same size, long tail

  • GPT-5 Codex vs GPT-6 Luna ProSame lab
  • GPT-5 Codex vs GPT-6 Sol ProSame lab
  • MiMo-V2-Flash vs MiMo-V2.6-ProSame lab
  • MiMo-V2-Flash vs MiMo-V2.6-FlashSame lab
  • MiMo-V2-Flash vs Grok 4.3New provider
  • MiMo-V2-Flash vs Grok 4.5New provider
  • MiMo-V2-Flash vs Grok 4.6New provider
  • MiMo-V2-Flash vs Grok 4.7New provider

Model pages

  • GPT-5 Codex50 outputs, specs and price
  • MiMo-V2-Flash59 outputs, specs and price
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