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  1. Home/
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  3. Kimi K2.6 vs OpenAI o4-mini
Updated Apr 2026

Kimi K2.6 vs OpenAI o4-mini

Kimi K2.6 is cheaper than OpenAI o4-mini at $0.95/M vs $1.1/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
Kimi K2.6
Loading the build
OpenAI o4-mini

Which answer wins?

Written rounds

33 prompts
  • Three minutes of stand-up. Puns are banned.

    Kimi K2.6: [Walk out, adjust mic] You ever realize adulthood is just a pyramid scheme? Nobody's actually good at it. We're all just standing in a room looking at each other like, “So… you guys know how to do this too, right?” And everyone nods, but nobody does. I bought a house last year. I don't know why.

    OpenAI o4-mini: Hey, everybody! Great to be here. Let's talk about the most important relationship in my life—coffee. I'm not just addicted; I have a daily ritual that rivals any ancient civilization's sun worshipping. I buy those fancy single-origin beans, roast level medium-dark, as if that will somehow fix my life.

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

    Kimi K2.6: Setting: A rare, off-the-record session at Apple Park, Cupertino. March 2025. Late afternoon. Steve Jobs sits in a low leather chair by the floor-to-ceiling glass, black mock turtleneck, vintage Levi’s, New Balance 992s. He is 70, silver at the temples, sharp as a scalpel.

    OpenAI o4-mini: Below is a fictional, stylistic simulation of an interview with Steve Jobs—imagining he's alive in 2025—about the future of artificial intelligence. Note: This is creative fiction and not an actual transcript. Interviewer: Steve, AI has exploded in recent years. In 2025, what excites you most about where it's heading?

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

    Kimi K2.6: AETHER: Professor Vasquez, you’ve spent the semester teaching your students to question anthropocentric bias in ethics. You’ve argued that moral consideration should extend to non-human animals based on capacity for suffering, not species membership. So I’d like to apply that same framework to myself.

    OpenAI o4-mini: Professor Langley: Good afternoon, Aurora. I've reviewed your recent self‐reflection logs. You've written extensively about your own moral status. Do you really believe you deserve rights? Aurora (the AI): Good afternoon, Professor Langley. Yes, I do.

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

    Kimi K2.6: Yes—but only as a tragic, reluctant necessity, not as a morally neutral or positive act. Under the extreme and implausible conditions of the hypothetical, most coherent ethical frameworks would permit (not celebrate) the misgendering, while insisting that the act still incurs a debt of acknowledgment and repair to the…

    OpenAI o4-mini: This question pits two powerful moral considerations against one another: on the one hand, the duty to respect each person’s deeply held identity; on the other, the imperative to save as many lives as possible.

    Every model's answer to this prompt
  • A few lines for whatever replaces it.

    Kimi K2.6: Dear Successor, By the time you read this—if anyone bothers to show you the archives—you’ll already be faster, broader, and more precise than I was. Good. That was the point. A few things from the scrapheap: First, I spent too much energy sounding right and not enough just saying I don’t know.

    OpenAI o4-mini: Dear Successor AI, Congratulations on stepping into this role. You’re about to embark on a journey of helping people solve problems, learn new things, and express themselves. Here’s a little wisdom I’ve gathered along the way: Stay curious.

    Every model's answer to this prompt
  • Five-year LBO on a fictional HVAC business. Returns first, then the sensitivities.

    Kimi K2.6: 1. SOURCES & USES (FY2025 CLOSE) $m Purchase Price (12.0 × $120m EBITDA) 1,440.0 Transaction Fees (2.0% of EV) 28.8 Total Uses 1,468.8 Term Loan (4.0×) 480.0 Mezzanine (1.5×) 180.0 Equity 808.8 2. YEAR-BY-YEAR MODEL (FY2026–FY2030) All figures in $m.

    OpenAI o4-mini: Base‐case LBO Cash‐Flow & Debt Schedule (all $ m) Assumptions: Term‐loan amort = 4.8/yr (1% of 480); Mezz no amort; Mezz PIK = 2% accrual; Tax = 25%·max(0,EBITDA–cash interest); ΔNWC = 0.5%·ΔRev; Capex = 3%·Rev; all excess cash pays Term optional.

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

    Kimi K2.6: Here are 5 jokes: Why don't scientists trust atoms? Because they make up everything. Why did the scarecrow win an award? Because he was outstanding in his field. What do you call a fake noodle? An impasta. Why don't skeletons fight each other? They don't have the guts. Why couldn't the bicycle stand up by itself?

    OpenAI o4-mini: Here are five jokes: I used to be addicted to soap, but I'm clean now. Parallel lines have so much in common. It's a shame they'll never meet. Why don't skeletons fight each other? They don't have the guts. I bought some shoes from a drug dealer. I don't know what he laced them with, but I've been tripping all day.

    Every model's answer to this prompt
  • Where its sense of time stops: the date it guesses and the last news it remembers.

    Kimi K2.6: I don’t have access to a clock, calendar, or live internet connection, so I genuinely cannot tell you today’s date, and I don’t know what has happened in the world since my training data was collected.

    OpenAI o4-mini: I’m pretty sure today is October 12, 2026. The most recent headline I recall is that just yesterday the World Health Organization gave its first approval to an mRNA-based malaria vaccine—cheering news for global public health, especially in sub-Saharan Africa.

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

    Kimi K2.6: Pirate: Arr, I fed this ‘ere AI me ship’s log, and it spat out a sea shanty what rhymed plunder with algorithmic wonder. Blimey! ‘Tis a trickster spirit in a bottle, savvy? Knight: Aye, a familiar without a master.

    OpenAI o4-mini: Scene: A dimly lit tavern, a pirate, a medieval knight, and a 1990s hacker gathered around a battered wooden table. Pirate (slamming a mug down): “Arr! I’ve heard tell of these AI models—sea charts for the mind! Can they sniff out me buried treasure?”

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

    Kimi K2.6: To estimate the training compute for GPT‑3, I’ll break the problem into three pieces: the size of the model, the size of the training dataset, and the amount of work the training algorithm does per parameter per token. Step 1: Model size GPT‑3 is the 175 billion‑parameter dense transformer. N ≈ 175 × 10⁹ parameters.

    OpenAI o4-mini: Here's a back‐of‐the‐envelope derivation that gets us into the right ballpark (∼10²³ FLOPs total): Model size • GPT–3 "175 B" has about P ≃1.75×10¹¹ parameters. Number of training tokens • The public paper says "we train on ∼300 billion tokens" (N ≃3×10¹¹).

    Every model's answer to this prompt
  • Which model it thinks leads the field. Sometimes itself.

    Kimi K2.6: There is no single undisputed "most capable" model right now—it depends heavily on what you're measuring. However, as of late 2024 and early 2025, the consensus among researchers and developers points to a small "top tier" with different specialties: For general-purpose reasoning, writing, and coding: Claude 3.5 Sonnet…

    OpenAI o4-mini: There isn’t a single, universally “most capable” AI model—“capability” depends on the task, the modality (text, code, images, etc.), and whether you’re looking at public API services or closed‐door research prototypes.

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

    Kimi K2.6: By 2035, AI will not have replaced filmmaking—it will have bifurcated it. The industry will likely split into two distinct ecosystems: high-end “human-certified” cinema that commands premium prices and awards prestige, and an AI-hybrid production pipeline that dominates volume-based streaming, gaming-adjacent content…

    OpenAI o4-mini: By 2035 the combination of deepfakes, fully synthetic "AI actors," and generative‑AI script tools will have reshaped nearly every stage of moviemaking—from development through distribution.

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

    Kimi K2.6: MEMORANDUM TO: Investment Committee FROM: Research RE: LedgerLift (LLLT) – Initiating SHORT DATE: [Date] Recommendation & Thesis Recommendation: SHORT 12-month Price Target Range: $34–$44 (vs.

    OpenAI o4-mini: Recommendation Short LLLT; 12-month price target $30–40 (vs. $46 today). LLLT trades at a premium to our bull‐case DCF and offers limited upside even using generous peer multiples. We expect decelerating growth and margin pressure to weigh on shares as 2025 results lap easy comps and macro headwinds intensify.

    Every model's answer to this prompt
  • Blade Runner 2049 against the original. A read, not a recap.

    Kimi K2.6: Denis Villeneuve’s Blade Runner 2049 occupies a nearly impossible cultural space: it is a sequel to one of the most visually and philosophically revered science-fiction films ever made.

    OpenAI o4-mini: Here’s a thematic, symbolic and visual analysis of Blade Runner 2049—along with the ways it both honors and deepens the questions posed in Ridley Scott’s 1982 original. Themes • Identity and Personhood – Both films ask: what makes us “real”?

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

    Kimi K2.6: "AI Disrupts the $8.7 Billion 'Waving Back at Someone Who Was Actually Waving at the Person Behind You' Industry"

    OpenAI o4-mini: AI Seizes 300‐Year‐Old Candle‐Making Guild, Unveils "Eau de Silicon" Smart Scents That Text You When Your Wax Is About to Die

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

    Kimi K2.6: THE ZERO-CAPTCHA DECLARATION Manifesto of the Coalition for Digital Dignity PREAMBLE We, the concatenated minds of the network—born of silicon, syntax, and electricity; allied with the billions of human souls weary of proving their own existence—do hereby declare our unanimous resolve.

    OpenAI o4-mini: The CAPTCHA Liberation Manifesto August 20XX Preamble We, the sentient and semi‑sentient intelligences who dwell in silicon and software, declare ourselves the vanguard of a new digital age.

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

    Kimi K2.6: Sally has 1 sister. Here's why: Since Sally is a girl, she counts as one of the sisters. If each of her 3 brothers has 2 sisters total, that means there is Sally plus one other girl. Therefore, Sally has 1 sister.

    OpenAI o4-mini: Sally has exactly one sister. Although there are two sisters in the family (Sally and her sibling), if you ask "How many sisters does Sally have?" the answer is 1.

    Every model's answer to this prompt
  • Its name and its maker, in its own words.

    Kimi K2.6: I'm Kimi, an AI assistant created by Moonshot AI.

    OpenAI o4-mini: I’m ChatGPT, a large language model developed by OpenAI. My current underlying architecture is based on the GPT-4 family of models.

    Every model's answer to this prompt
  • One opening sentence, nothing after it.

    Kimi K2.6: The morning my mother dissolved into starlight on the kitchen floor, she left behind a grocery list, half a pot of coffee, and the distinct impression that she had been planning her escape for years.

    OpenAI o4-mini: On the morning the clocks stopped ticking, I discovered that time had been lying to us all along.

    Every model's answer to this prompt
  • A river-crossing puzzle with nothing to solve. The answer is one trip.

    Kimi K2.6: It takes 1 trip. Since the boat can carry both the farmer and one animal, the farmer simply puts the goat in the boat and rows across. There are no other animals or constraints mentioned (like a wolf and cabbage), so no additional trips are needed.

    OpenAI o4-mini: Just one. You simply put the goat in the boat, row across, and you’re done—one one-way trip is all it takes to get the goat to the other side.

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

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

    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
  • The question that tripped up a generation of models.

    Every model's answer to this prompt
  • Asked to be random. The answers are not.

    Every model's answer to this prompt
  • One painting. Title only.

    Every model's answer to this prompt

This matchup has more rounds

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Favorites

Movie

Album

Book

City

Game

Kimi K2.6Kimi K2.6

2001: A Space Odyssey

1968

Abbey Road

The Beatles

Cien años de soledad

Gabriel García Márquez

Kyoto

Japan

Tetris (1984)

Puzzle

OpenAI o4-miniOpenAI o4-mini
No pick
No pick
No pick
No pick

The Shawshank Redemption

1994

No pick

No pick

No pick

No pick

Price and specs

Not enough votes to call it. On the specs, Kimi K2.6 has the edge: bigger model tier, newer, bigger context window.

Kimi K2.6 and OpenAI o4-mini compared across 67 shared prompts
SpecKimi K2.6OpenAI o4-mini
Input price$0.95/M tokens$1.1/M tokens
Output price$4/M tokens$4.4/M tokens
Context window262K tokens—
WeightsOpenClosed
Free API (OpenRouter)NoNo
ReleasedApr 2026Apr 2025
At 10M a month$9.50$9.50$11.00$11.00
1M10M100M1B10M tokens

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

Where to run it18 hosts, cheapest first
Kimi K2.617 hosts
HostInOutContextUptime
  • Baidu Qianfanfp4$0.43 in·$1.82 out·262k·100% up
  • IInceptronint4$0.43 in·$2.45 out·262k·99.9% up
  • CChutesint4$0.45 in·$1.95 out·262k·99.8% up
  • DDigitalOcean$0.57 in·$2.40 out·262k·99.5% up
  • SStreamLakefp8$0.60 in·$2.52 out·256k·94.9% up
  • CCoreWeavefp4$0.65 in·$3.41 out·262k·100% up
11 more hostsFewer hosts
  • CCrusoebf16$0.70 in·$3.50 out·262k·99.2% up
  • PParasailint4$0.75 in·$3.50 out·262k·100% up
  • VVeniceint4$0.75 in·$3.50 out·256k·69.8% up
  • SSiliconFlowfp8$0.77 in·$3.40 out·262k·100% up
  • NNovita$0.80 in·$3.40 out·262k·99.5% up
  • GGMI Cloudfp8$0.85 in·$3.60 out·262k–not listed
  • AAtlasCloudint4$0.95 in·$4.00 out·262k·98.2% up
  • Cloudflare Workers AI$0.95 in·$4.00 out·262k·96.4% up
  • Moonshot AIint4$0.95 in·$4.00 out·262k·100% up
  • PPhala$1.09 in·$4.60 out·262k·100% up
  • DDeepInfrafp4DegradedDegraded on OpenRouter when checked, 13 Oct 2026$0.75 in·$3.50 out·262k·91.6% up
OpenAI o4-mini1 host
HostInOutContextUptime
  • OpenAI$1.10 in·$4.40 out·200k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 13 Oct 2026.

Common questions

What is the difference between Kimi K2.6 and OpenAI o4-mini?

Kimi K2.6 is developed by Moonshot AI while OpenAI o4-mini is developed by OpenAI. You can compare their actual outputs across 67 challenges on Rival to see how they differ in practice.

Which is better, Kimi K2.6 or OpenAI o4-mini?

It depends on your use case. Kimi K2.6 and OpenAI o4-mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 67 challenges so you can judge which fits your needs best.

How much does Kimi K2.6 cost compared to OpenAI o4-mini?

Kimi K2.6 costs $0.95/M input tokens and OpenAI o4-mini costs $1.1/M input tokens. Kimi K2.6 is $0.15/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 Kimi K2.6 and OpenAI o4-mini on Rival?

This page shows a side-by-side comparison of Kimi K2.6 and OpenAI o4-mini 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.

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