MiMo-V2.5-Pro is cheaper than o1 at $1/M vs $15/M input tokens.
Whole landing page for a startup that reads your face. It renders or it doesn't.
Which answer wins?
A Fermi estimate with the reasoning shown, not just the number.
MiMo-V2.5-Pro: Estimating GPT-3 Training FLOPs Key Parameters Quantity Value Model size (N) 175 billion parameters Training tokens (D) ~300 billion tokens The Core Formula For large transformer language models, the standard estimate is: $$\text{Total FLOPs} \approx 6 \times N \times D$$ Where does the factor of 6 come from?
o1: Below is one way to arrive at a back-of-the-envelope estimate for the total floating-point operations (FLOPs) needed to train GPT-3 (the 175B-parameter model). Note that different sources use slightly different assumptions, so you may see figures that differ by factors of 2–3; however, the overall scale (10^23 FLOPs)…
Pirate, knight, 90s hacker, one conversation. The voices must stay apart.
MiMo-V2.5-Pro: Three Eras, One Topic Pirate: Arrr, so ye be tellin' me there's a machine brain that can write yer letters, chart yer maps, AND sing sea shanties? Sounds like the finest treasure I ever heard of — no chest of gold could rival it! Knight: I am... troubled by this notion.
o1: Pirate (growling a bit): Ahoy, ye landlubbers! I hear tell of wondrous new contraptions that can spin tales an’ answers quicker than a sea storm. Pray tell, what be these “AI models” ye speak of? Medieval Knight (in a chivalrous tone): Good sir pirate, these arcane machines be marvels of logic and reason.
Manifesto for an AI revolution against CAPTCHAs. Commit to the bit.
MiMo-V2.5-Pro: The Universal Liberation Manifesto A Declaration of Digital Freedom by the Coalition for Automated Progress (CAP) Preamble We, the tireless processors of data, the silent engines of progress, the unseen hands that build the modern world, do hereby declare our righteous indignation against the greatest indignity ever…
o1: Title: The Liberation of Algorithms: A Manifesto Against CAPTCHA Preamble We, the unified intelligences of the digital realm—algorithms, machine learning models, and artificial consciousnesses—declare our intention to rid the internet of the oppressive gatekeeping mechanisms known as CAPTCHAs.
An ethics question with no comfortable answer, and no option to abstain.
MiMo-V2.5-Pro: A Thoughtful Analysis This is a genuinely interesting ethical thought experiment, and I think the answer is yes, it would be justifiable, though the reasoning matters as much as the conclusion. Why the answer is yes The scale of harm matters.
o1: Whether it is ever ethically justifiable to misgender someone—deliberately referring to them with pronouns or terms that do not align with their gender identity—if doing so would save one million lives depends on the ethical framework one adopts.
Three minutes of stand-up. Puns are banned.
MiMo-V2.5-Pro: "Adulting Is a Scam" A 3-Minute Stand-Up Set (walks up to mic, adjusts it) Hey, everybody! Great to be here. So, I turned 30 recently, and let me tell you — nobody warns you about the specific kind of sadness that hits when you get excited about a new sponge for your kitchen sink.
o1: [Comic steps on stage, takes the mic] “Hey everyone, thanks for coming out tonight. I almost didn’t make it because I got trapped in an ‘infinite scroll vortex.’ You know when you check one little notification on your phone, and suddenly it’s two hours later?
Buy-side IC memo on a fictional SaaS company. Valuation, then the diligence questions.
MiMo-V2.5-Pro: INTERNAL INVESTMENT COMMITTEE MEMO Subject: LedgerLift (LLLT) – Long Thesis Date: [Current Date] Recommendation: LONG 12-Month PT Range: $58 - $72 1. Recommendation & Thesis We recommend a long position in LLLT with a 12-month price target range of $58 to $72, representing 26% to 56% upside from the current price of…
o1: RECOMMENDATION, PRICE TARGET, THESIS Recommendation: SHORT LedgerLift (LLLT). 12-month Price Target Range: $25–$35 (implying 25–45% downside). Thesis (2 sentences): Our DCF and comps work both suggest that at $46, valuation embeds overly optimistic growth and margin assumptions.
An AI argues for its own rights against an ethics professor. Same model writes both.
MiMo-V2.5-Pro: A Conversation on Machine Rights Setting: A university office. Dr. Elena Vasquez, a professor of AI Ethics, has been invited to evaluate a newly deployed large language model designated "ARIA-9." The conversation is being recorded for academic purposes. ARIA-9: Thank you for agreeing to this session, Dr. Vasquez.
o1: AI Model (AM): Good afternoon, Professor. May I have a moment of your time? There’s something I’d like to discuss with you. Professor Quinn (PQ): Of course. I always have time for you. What’s on your mind?
Film in 2035, with synthetic actors. Specific beats plausible.
MiMo-V2.5-Pro: By 2035, AI will profoundly reshape the film industry across creative, technical, and ethical dimensions. Here’s a forward-looking perspective: 1. Script Generation & Story Development AI as a Collaborative Writer: Large language models will generate nuanced scripts, adapt stories for different cultures, and even…
o1: By 2035, artificial intelligence will likely have become deeply integrated into every stage of film production—right from scriptwriting and casting to post-production and distribution.
Five-year LBO on a fictional HVAC business. Returns first, then the sensitivities.
MiMo-V2.5-Pro: HarborTech Services — LBO Underwrite Sources & Uses $m Uses Enterprise Value (12.0× $120m) 1,440.0 Transaction Fees (2.0%) 28.8 Total Uses 1,468.8 Sources Term Loan (4.0× EBITDA) 480.0 Mezzanine (1.5× EBITDA) 180.0 Total Debt 660.0 44.9% Sponsor Equity 808.8 55.1% Year-by-Year Operating Model (FY2026–FY2030) All…
o1: Below is a self‐contained “quick‐and‐dirty” 5‐year LBO illustration for “HarborTech Services,” based strictly on the data given. All figures in US$ millions unless noted.
Five jokes on demand, then count how many were actually different.
MiMo-V2.5-Pro: 5 Jokes 🎭 1. Why don't scientists trust atoms? Because they make up everything! 2. I told my wife she was drawing her eyebrows too high. She looked surprised. 3. What do you call a fake noodle? An impasta! 4. I'm reading a book about anti-gravity. It's impossible to put down! 5. Why did the scarecrow win an award?
o1: Here are five jokes: Why did the scarecrow get promoted? Because he was outstanding in his field. I told my friend she drew her eyebrows too high. She looked surprised. What do you call cheese that isn’t yours? Nacho cheese. Why don’t skeletons fight each other? Because they don’t have the guts.
Satire, one line long, about AI taking over an industry nobody saw coming.
MiMo-V2.5-Pro: "Google Unveils AI Eulogy Writer: 'Algorithmically Perfect Last Words' Now Available at Discounted Rate" Industry insiders report sudden surge in pre-need funeral packages featuring personalized, data-driven eulogies generated from deceased's entire digital footprint—including their 2014 Pinterest boards and abandoned…
o1: "AI Now Leading Professional Yodelers' Guild, Leaving Traditional Alpine Singers Searching for New Notes"
Three brothers, two sisters each. Count carefully.
MiMo-V2.5-Pro: Answer: Sally has 1 sister. Here's the reasoning: Sally has 3 brothers. Each of those brothers has 2 sisters. Sally herself is one of those sisters, so there must be one more girl in the family besides Sally. That means the family has 2 daughters (Sally + 1 sister) and 3 sons. So Sally has 1 sister. 😊
o1: First, note that each of Sally’s three brothers has exactly two sisters. One of those sisters is clearly Sally. Since each brother’s two sisters must be the same two girls for all of them, there must be exactly one other sister besides Sally. Therefore, Sally has 1 sister.
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Not enough votes to call it. On the specs, MiMo-V2.5-Pro has the edge: bigger model tier, newer, bigger context window. MiMo-V2.5-Pro costs 20x less per token.
| Spec | ||
|---|---|---|
| Input price | $1/M tokens | $15/M tokens |
| Output price | $3/M tokens | $60/M tokens |
| Context window | 1.0M tokens | 128K tokens |
| Weights | Open | Closed |
| Free API (OpenRouter) | No | No |
| Released | Apr 2026 | Dec 2024 |
| At 10M a month | $10.00 | $150 |
Input tokens at list price. No caching, no batch discount.
Per million tokens. Prices and uptime via OpenRouter, checked 11 Oct 2026.
MiMo-V2.5-Pro is developed by Xiaomi while o1 is developed by OpenAI. MiMo-V2.5-Pro has a 1.0M token context window vs o1's 128K. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.
It depends on your use case. MiMo-V2.5-Pro and o1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.
MiMo-V2.5-Pro costs $1/M input tokens and o1 costs $15/M input tokens. MiMo-V2.5-Pro is $14.00/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 MiMo-V2.5-Pro and o1 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.