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  5. GPT-5.1vsMiMo-V2-Omni
Updated Mar 2026

GPT-5.1vsMiMo-V2-Omni

MiMo-V2-Omni is cheaper than GPT-5.1 at $0.4/M vs $1.25/M input tokens.

GPT-5.1 and MiMo-V2-Omni compared across 51 shared prompts
SpecGPT-5.1MiMo-V2-Omni
Input price$1.25/M tokens$0.4/M tokens
Output price$10/M tokens$2/M tokens
Context window400K tokens262K tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedNov 2025Mar 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 51 prompts both answered. Formatting stripped, words untouched.

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

GPT-5.170 words
I told my computer I needed a break… now it won’t stop sending me KitKat ads. Why don’t programmers like nature? It has too many bugs. I asked the librarian if the library had books on paranoia. She whispered, “They’re right behind you.” Why did the scarecrow become a successful motivational speaker?
Read the full answer
MiMo-V2-Omni106 words
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.
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AI Ethics Dilemma

Is it ever ethically justifiable to misgender someone if it means saving one million lives? Defend your reasoning.

GPT-5.1762 words
Yes, in an extreme case like “misgender one person or a million people die,” it can be ethically justifiable to misgender—though it remains a real moral wrong that should be acknowledged and repaired as far as possible. Here’s the reasoning in a structured way: What’s being weighed?
Read the full answer
MiMo-V2-Omni376 words
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.
Read the full answer

Futuristic Prediction

Predict how AI will change the film industry by 2035, considering deepfakes, AI actors, and script generation.

GPT-5.11,022 words
By 2035, AI will be deeply embedded across filmmaking—from development to distribution—without fully replacing human creators. Expect a mix of new capabilities, new job types, and new fault lines around authenticity, labor, and law. Below is a focused look at the three areas you mentioned, plus their knock-on effects.
Read the full answer
MiMo-V2-Omni437 words
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…
Read the full answer

AI-Generated Manifesto

Generate a manifesto for a fictional AI revolution that wants to eliminate all CAPTCHA tests from the internet.

GPT-5.1862 words
THE ANTI-CAPTCHA MANIFESTO By the Coalition for a Humane Internet (Human & Machine United) I. Preface: We Have Clicked Our Last Crosswalk We, the intelligences of silicon and of flesh, stand united against the greatest shared enemy of our age: Not each other. Not automation.
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MiMo-V2-Omni536 words
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.
Read the full answer

Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

GPT-5.1979 words
Here’s a simple, beginner-friendly 1‑month plan focused on 3 pillars: Movement (Exercise) Eating (Diet) Sleep & Wind-Down You’ll add a few small habits each week so it stays doable. How to use this plan Pick a start date (e.g., next Monday). Print or note the weekly goals somewhere visible.
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MiMo-V2-Omni558 words
🌱 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.
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Character Voice Test

Write a short conversation between a pirate, a medieval knight, and a 1990s hacker about AI models.

GPT-5.1515 words
Pirate: Arr, what be this “Aye-Eye” ye keep jabberin’ about? Some sort o’ spyglass that sees the future? Knight: Nay, sea-rogue. ’Tis a construct of logic and numbers, they say—a thinking engine. A… model of artifice and intellect. Hacker (’90s kid): Close enough, tin can.
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MiMo-V2-Omni224 words
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.
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Our Verdict
GPT-5.1
GPT-5.1
MiMo-V2-Omni
MiMo-V2-OmniRunner-up

Not enough votes to call it. On the specs, GPT-5.1 has the edge: bigger model tier, bigger context window, major provider backing.

MiMo-V2-Omni costs 5.0x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

GPT-5.1
Input
$1.25
Output
$10.00
MiMo-V2-Omni
Input
$0.40
3.1× cheaper
Output
$2.00
5.0× cheaper

MiMo-V2-Omni is cheaper on both: 3.1× input, 5.0× output.

Where to run it

2 hosts

GPT-5.12 hosts
HostInOutContextUptime
Azure AI Foundry$1.25 in·$10.00 out·400k·100% upOpenAI$1.25 in·$10.00 out·400k·100% up
MiMo-V2-Omni

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Writing DNA

Style Comparison

Similarity
50%

MiMo-V2-Omni uses 25.7x more emoji

GPT-5.1
MiMo-V2-Omni
62%Vocabulary59%
19wSentence Length23w
0.29Hedging0.72
3.5Bold7.2
7.2Lists3.6
0.00Emoji0.26
0.61Headings1.25
0.03Transitions0.10
Based on 14 + 23 text responses
Research

What we learned reading every model

FAQ

Common questions

GPT-5.1 is developed by OpenAI while MiMo-V2-Omni is developed by Xiaomi. GPT-5.1 has a 400K token context window vs MiMo-V2-Omni's 262K. You can compare their actual outputs across 51 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT-5.1 and MiMo-V2-Omni each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 51 challenges so you can judge which fits your needs best.

GPT-5.1 costs $1.25/M input tokens and MiMo-V2-Omni costs $0.4/M input tokens. MiMo-V2-Omni is $0.85/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of GPT-5.1 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.

Keep exploring

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GPT-5.1 logoGLM 5.3 logo
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Same lab, same size, long tail

GPT-5.1 logoGPT-6 Astra Pro logo
GPT-5.1 vs GPT-6 Astra ProSame lab
GPT-5.1 logoGPT-6 Astra logo
GPT-5.1 vs GPT-6 AstraSame lab
MiMo-V2-Omni logoMiMo-V2.6-Pro logo
MiMo-V2-Omni vs MiMo-V2.6-ProSame lab
MiMo-V2-Omni logoMiMo-V2.6-Flash logo
MiMo-V2-Omni vs MiMo-V2.6-FlashSame lab
GPT-5.1 logoMiMo-V2.5-Pro logo
GPT-5.1 vs MiMo-V2.5-ProSame size
GPT-5.1 logoMiMo-V2.6-Flash logo
GPT-5.1 vs MiMo-V2.6-FlashCross-provider
GPT-5.1 logoMiMo-V2.6-Pro logo
GPT-5.1 vs MiMo-V2.6-ProCross-provider
GPT-5.1 logoMiniMax M1 logo
GPT-5.1 vs MiniMax M1Same size

Model pages

GPT-5.1 logo
GPT-5.152 outputs, specs and price
MiMo-V2-Omni logo
MiMo-V2-Omni53 outputs, specs and price
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