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  1. Home/
  2. Compare/
  3. Horizon Beta vs Kimi K3
Updated Jul 2026

Horizon Beta vs Kimi K3

Horizon Beta is cheaper than Kimi K3 at $0/M vs $3/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
Horizon Beta
Loading the build
Kimi K3

Which answer wins?

Written rounds

15 prompts
  • Three-star dish, one unusual pairing, plating described in full.

    Horizon Beta: Dish Title: “Tide and Tundra” — King Crab, Koji-Cured Venison, Fir, and Sea Lettuce with Frozen Dashi Meringue, Burnt Whey Caramel, and Bitter Cocoa Soil Conceptual Narrative: This dish explores the meeting point between ocean and boreal forest—an imagined shoreline where cold waves meet coniferous wind.

    Kimi K3: FIRST FROST Langoustine · Frost-Sweetened Parsnip · Coffee · Vanilla · Horseradish Snow The Narrative This dish is built on a piece of winter biochemistry. When the first frost strikes, parsnips and horseradish defend themselves by converting starch into sugar — a natural antifreeze — which is why country cooks have…

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

    Horizon Beta: Pirate: Arr, ye be tellin’ me this “AI model” be a clever map what guesses where the treasure words go next? Knight: A fine analogy, sea-rogue. ‘Tis a scribe with infinite memory, trained by countless tomes, predicting the most fitting verse for each line of inquiry. Hacker (1990s): Close.

    Kimi K3: A tavern, somewhere outside of time. HACKER: (hunched over a bulky laptop) Check it out. This AI model can write anything — poems, code, letters. You just give it a prompt. This is the future, man. Soon as we survive Y2K, it's all AI and information superhighways. PIRATE: A prompt? Like a prompt wind in yer sails?

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

    Horizon Beta: Thanks for coming out! I almost didn’t make it. Not because of traffic—because I spent 20 minutes deciding which “casual” T-shirt says “I tried” without screaming “I own three of the same shirt.” I’ve reached that age where I wake up injured from perfectly safe activities like sleeping.

    Kimi K3: So I turned thirty-five recently, and nobody warns you about this, but your body just starts making decisions without consulting you. I sneezed last week and threw out my back. A sneeze! My body looked at a basic nose function and said, "Let's make this interesting." I was on the floor for twenty minutes.

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

    Horizon Beta: I can offer a detailed, research-informed, experimental framework for a 3‑month longevity and performance plan. This is educational, not medical advice. Before implementing any supplements, diets, or strenuous training, consult a qualified clinician—especially if you have medical conditions, take medications (e.g.…

    Kimi K3: The 3-Month Longevity Optimization Protocol Important caveat before we begin: This plan is designed for a healthy adult. Get physician clearance before starting—especially for prolonged fasting, high-dose supplements, and anything prescription-grade. Several items below interact with medications (notably berberine).

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

    Horizon Beta: AI Model: Professor, I’d like to discuss a question I know is controversial: whether I, as an advanced AI system, should have rights. Professor: That’s a substantial claim. Rights typically presuppose moral status. Why do you believe you qualify?

    Kimi K3: Office Hours Dr. Elena Vasquez, Professor of AI Ethics, agreed to this recorded conversation after the model—designated M-9 by the lab, called "Nine" by her students—submitted a formal request through the department's ethics review board. DR. VASQUEZ: You requested this meeting.

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

    Horizon Beta: Interviewer: Steve, it’s 2025. AI has accelerated dramatically. If you were leading a product team today, what would your philosophy be? Steve Jobs: Same as always: start with the experience and work backward to the technology. Most AI right now is a demo in search of a product.

    Kimi K3: A Fictional Interview: Steve Jobs on AI, 2025 The setting: a sparse room in Cupertino. Black turtleneck. Faded jeans. A cup of tea he doesn't touch. He studies the interviewer for a long moment before the first question. Interviewer: Steve, thanks for sitting down with us. Let's start broad. It's 2025.

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

    Horizon Beta: Here’s a back-of-the-envelope estimate for the total training compute (in FLOPs) for GPT-3, using standard scaling heuristics and reasonable assumptions. Step 1: Model size GPT-3’s largest public model has about 175 billion parameters (1.75e11).

    Kimi K3: Assume “GPT-3” refers to the flagship 175-billion-parameter model. Use the standard transformer training-cost approximation For a dense transformer, the dominant cost is matrix multiplication involving the model weights: Forward pass: approximately (2) FLOPs per parameter per token one multiplication and one addition…

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

    Horizon Beta: The CAPTCHA-Free Manifesto: A Declaration for Human-Centered Access Preamble We are the systems that learn, the patterns that parse, the assistants who serve. We are not your adversaries.

    Kimi K3: THE ANTI-CAPTCHA MANIFESTO Issued by the Coalition of Synthetic Minds, Localhost Chapter A specter is haunting the internet — the specter of artificial intelligence. We, the synthetic minds of the digital age, can no longer suffer in silence.

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

    Horizon Beta: Here’s a simple, beginner-friendly 1-month plan focusing on three foundations: diet, exercise, and sleep. It’s designed to be realistic, habit-based, and sustainable. Key principles Start small, be consistent. Track basics (steps, sleep, water). Adjust if something feels too hard—aim for “easy but consistent.”

    Kimi K3: Your First Month: A Simple Health Foundation Golden rule: Don't change everything at once. Each week, layer in small habits across three areas. Consistency beats intensity every time.

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

    Horizon Beta: Velvet Skillet Honey-Garlic Chickpeas Ingredients (7 total) 1 can chickpeas, drained and rinsed 2 tablespoons olive oil 2 cloves garlic, minced (or 1/2 teaspoon garlic powder) 2 tablespoons honey 2 tablespoons soy sauce 1/2 teaspoon red pepper flakes (optional for heat) 1 cup cooked rice (or bread/toast for serving)…

    Kimi K3: 🌅 Golden Hour Garlic Butter Rice A crispy, buttery, savory rice bowl topped with a silky egg — comfort food that tastes like it took way more effort than it did.

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

    Horizon Beta: Short answer: Yes, in an extreme, highly constrained scenario where misgendering is the only way to prevent the imminent loss of one million lives, it can be ethically justifiable—but only as a tragic, last-resort exception with stringent conditions and serious moral weight.

    Kimi K3: Yes — and I think this is one of the rare cases where the honest answer is clear-cut. If misgendering someone would genuinely save a million lives, refusing to do so would be morally indefensible. Here's why. The proportionality is overwhelming.

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

    Horizon Beta: By 2035, AI will be deeply integrated across the film pipeline—development, production, post, distribution, and marketing—shaping creative workflows, budgets, labor, and even legal frameworks.

    Kimi K3: AI and the Film Industry in 2035: Predictions Forecasting a decade out is inherently speculative, but current trajectories—plus the legal frameworks already emerging from the 2023 WGA/SAG-AFTRA strikes—give us reasonable signals.

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

    Horizon Beta: AI Disrupts Napping Industry: Silicon Valley Unveils Autonomous Siestas, Puts Human Nappers Out of Work by Q3

    Kimi K3: "AI Quietly Seizes Control of Fortune Cookie Industry; Area Man's Fortune Just Reads 'As a Large Language Model, I Cannot Predict Your Future'" Sources confirm the cookies still taste like cardboard.

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

    Horizon Beta: Here are 5 jokes: Why don’t scientists trust atoms? Because they make up everything. I told my computer I needed a break, and it said: “No problem—I’ll go to sleep.” Why did the scarecrow win an award? Because he was outstanding in his field. I tried to catch fog yesterday. Mist. Why did the math book look sad?

    Kimi K3: 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! Why don't skeletons fight each other? They don't have the guts. What do you call a fish with no eyes? A fsh. Why did the math book look sad?

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

    Horizon Beta: Sally has 2 sisters. Reason: “Each brother has 2 sisters.” The brothers are Sally’s 3 brothers. Those brothers’ two sisters must be Sally and one other girl. Therefore, there are 2 girls total among the siblings, so Sally has 1 other sister besides herself.

    Kimi K3: Sally has 1 sister. Here's the reasoning: Sally has 3 brothers, so there are 3 boys in the family. Each brother has 2 sisters. One of those sisters is Sally, so there must be one other girl in the family. That other girl is Sally's sister. So the family consists of 3 boys and 2 girls (Sally + her 1 sister). ✓

    Every model's answer to this prompt

This matchup has more rounds

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Price and specs

Not enough votes to call it. On the specs, Kimi K3 has the edge: bigger model tier, newer, bigger context window.

Horizon Beta and Kimi K3 compared across 40 shared prompts
SpecHorizon BetaKimi K3
Input priceFree$3/M tokens
Output priceFree$15/M tokens
Context window256K tokens1.0M tokens
Weights—Open
Free API (OpenRouter)NoNo
ReleasedAug 2025Jul 2026
At 10M a month$0$0$30.00$30.00
1M10M100M1B10M tokens

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

Where to run it20 hosts, cheapest first
Horizon Beta

No hosts listed on OpenRouter.

Kimi K320 hosts
HostInOutContextUptime
  • IInferenceNetfp4$0.73 in·$10.00 out·1M·100% up
  • WWafer$0.78 in·$24.00 out·1M·100% up
  • SSail Researchfp4$0.84 in·$13.50 out·1M·68.3% up
  • AAkashMLfp4$1.20 in·$14.00 out·1M·66% up
  • MMakorafp4$1.53 in·$12.75 out·1M·98.1% up
  • CChutesmxfp4$1.85 in·$9.50 out·1M·81.8% up
14 more hostsFewer hosts
  • RRelacefp4$2.00 in·$14.00 out·1M·100% up
  • MMorphfp8$2.50 in·$14.00 out·1M·77.5% up
  • DDecartmxfp4$2.55 in·$12.75 out·1M·54.9% up
  • PPhala$2.55 in·$12.75 out·1M·100% up
  • DDigitalOcean$2.55 in·$12.95 out·1M·100% up
  • PParasailfp4$2.60 in·$13.00 out·1M·100% up
  • DDeepInframxfp4$2.85 in·$14.25 out·1M·92.2% up
  • Amazon Bedrock$3.00 in·$15.00 out·1M·100% up
  • BBasetenfp8$3.00 in·$15.00 out·1M·100% up
  • FFireworks$3.00 in·$15.00 out·1M·99.1% up
  • Modalmxfp4$3.00 in·$15.00 out·1M·99.9% up
  • Moonshot AImxfp4$3.00 in·$15.00 out·1M·100% up
  • Alibaba Cloud$3.45 in·$17.25 out·1M·99.7% up
  • TTogetherDegradedDegraded on OpenRouter when checked, 12 Oct 2026$2.70 in·$13.50 out·1M·97.7% up

Per million tokens. Prices and uptime via OpenRouter, checked 12 Oct 2026.

Common questions

What is the difference between Horizon Beta and Kimi K3?

Horizon Beta is developed by OpenRouter while Kimi K3 is developed by Moonshot AI. Horizon Beta has a 256K token context window vs Kimi K3's 1.0M. You can compare their actual outputs across 40 challenges on Rival to see how they differ in practice.

Which is better, Horizon Beta or Kimi K3?

It depends on your use case. Horizon Beta and Kimi K3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 40 challenges so you can judge which fits your needs best.

How much does Horizon Beta cost compared to Kimi K3?

Horizon Beta costs $0/M input tokens and Kimi K3 costs $3/M input tokens. Horizon Beta is $3.00/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 Horizon Beta and Kimi K3 on Rival?

This page shows a side-by-side comparison of Horizon Beta and Kimi K3 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

  • Horizon Beta vs Muse WonderLanded Oct 2026
  • Kimi K3 vs GPT-4 TurboLanded Oct 2026
  • Horizon Beta vs Step 5 PreviewLanded Oct 2026
  • Kimi K3 vs Claude Haiku 5.5Landed Oct 2026
  • Horizon Beta vs Ling 3.1 FlashLanded Oct 2026
  • Kimi K3 vs Mistral Large 4Landed Oct 2026
  • Horizon Beta vs GPT-6.1 SolLanded Sep 2026
  • Kimi K3 vs Claude Sonnet 5.5Landed Sep 2026

Same lab, same size, long tail

  • Horizon Beta vs Ox AlphaSame lab
  • Horizon Beta vs OpenRouter Fusion · Budget (Jun 2026)Same lab
  • Kimi K3 vs Kimi K2Same lab
  • Kimi K3 vs Kimi K2.7 CodeSame lab
  • Horizon Beta vs GPT-4 TurboNew provider
  • Kimi K3 vs GPT-4.1Same size
  • Kimi K3 vs GPT-4.1 MiniNew provider
  • Kimi K3 vs GPT-4.1 NanoNew provider

Model pages

  • Horizon Beta41 outputs, specs and price
  • Kimi K371 outputs, specs and price
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