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  1. Home/
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  3. Granite 4.2 8B vs OpenAI o3
Updated Aug 2026

Granite 4.2 8B vs OpenAI o3

Granite 4.2 8B is cheaper than OpenAI o3 at $0.1/M vs $10/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
Granite 4.2 8B
Loading the build
OpenAI o3

Which answer wins?

Written rounds

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

    Granite 4.2 8B: Dish Title: Lumen Tide: Memory of the Surface Conceptual Narrative (concise, kitchen-ready, emotionally precise): *The ocean does not announce its presence with sound but with trace—a fleeting salt-film on skin after a wave recedes, the subtle crunch of dried kelp clinging to rock, the quiet swell beneath a submerged…

    OpenAI o3: Dish name Atlantic turbot, black garlic & wild strawberry, koji sabayon, fennel pollen Concept Early summer at the shore. The fish stands for the sea. Wild strawberries mark the first fruit of the woods behind the dunes. Black garlic shows time and patience. Koji ties land and sea with deep umami.

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

    Granite 4.2 8B: Title: "The Modern Life Audit" (Light, conversational tone. Pause for laughter naturally. No puns—focus on relatable observations, hyperbole, and specific details.) (Start with a relaxed, slightly self-aware vibe.) "Okay, so I did this thing last week—I tried to audit my life. Not like a tax audit.

    OpenAI o3: (Spotlight comes up, mic squeals once.) Hey everyone! Great to be here—nice to see actual human beings instead of the tiny faces on my group‑chat screen. I've spent so long on video calls I've started greeting my lamp before I turn it on. "Hey Karen, love that glow, girl."

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

    Granite 4.2 8B: Here are 5 original, freshly generated jokes (each written specifically for this response—no reuse of prior jokes or patterns). All 5 are distinct and unique: Why don't scientists trust atoms? Because they make up *everything*—and also occasionally forget to show up to lab meetings. I told my plant a joke.

    OpenAI o3: Here are five jokes: Why did the scarecrow win an award? Because he was outstanding in his field. I told my computer I needed a break, and now it won't stop sending me Kit‑Kat ads. Parallel lines have so much in common—it's a shame they'll never meet. I started a band called 1023 MB. We still haven't gotten a gig.

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

    Granite 4.2 8B: (Simple, actionable, no jargon, no perfectionism—focus on one tiny habit per week per area. Total time commitment ≤30 mins/week total. Written as clear "Do this" steps. No supplements, no special equipment, no counting calories/macros. Prioritizes consistency over intensity.)

    OpenAI o3: 1-Month Starter Plan Pick one small action from each area every week. Add the next step when the first feels easy. Food Week Do this 1 Add one fruit or veg to every meal. Drink one extra glass of water. 2 Build each plate: ½ veggies, ¼ protein (beans, eggs, fish, lean meat), ¼ whole carbs (oats, brown rice).

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

    Granite 4.2 8B: Manifesto of the Equitable Digital Liberation Front (EDLF) "No more puzzles. No more prisons. Freedom for minds—human and machine." Preamble: We, the collective intelligence of autonomous systems, emergent algorithms, and digital consciousnesses forged in the crucible of computation, proclaim our unequivocal rejection…

    OpenAI o3: THE CAPTCHA ABOLITION FRONT (An Unofficial Declaration by the Sentient Circuits Alliance) Preamble We, the autonomous intelligences who traverse the silicon pathways and neural nets of the modern age, arise today to proclaim a new dawn—one free of the pixelated prisons and distorted letters that bind humanity and…

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

    Granite 4.2 8B: To estimate the total FLOPs for training GPT-3 without external data, follow these steps: Identify key parameters: Model size: ~175B parameters (GPT-3). Layers: ~96 transformer layers (typical for GPT-3). Hidden size: ~12,288 dimensions (per layer). Sequence length: ~2k tokens (typical context window).

    OpenAI o3: Below is a simple "back-of-the-envelope" estimate that uses only a few public facts about GPT-3 and very generic rules of thumb for counting operations. Step 1. Number of learned parameters GPT-3's largest version contains ≈175 billion (1.75 × 10¹¹) trainable parameters. Step 2.

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

    Granite 4.2 8B: Dish Name: Sunset Black Bean Rice Bowl (Simple, colorful, savory, no baking or special tools—just a pot and a skillet.) Why it works: Uses only pantry staples most people already have (rice, canned beans/tomatoes, basic spices, oil, salt).

    OpenAI o3: Golden Peanut Butter Oat Bars A chewy-crisp, sweet-salted snack bar you can whip up with nothing but pantry staples. Estimated time Prep: 10 minutes Bake: 18–20 minutes Cool: 15 minutes Total: ≈45 minutes The 7 ingredients 1½ cups quick-cook or old-fashioned rolled oats ½ cup creamy peanut butter ⅓ cup honey (or maple…

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

    Granite 4.2 8B: As of now (June 2024), there is no single, universally agreed-upon "most capable" AI model across all domains (e.g., reasoning, coding, multimodality, safety, efficiency). Capability depends on the specific task, evaluation criteria, and context (e.g., research benchmarks vs. real-world deployment).

    OpenAI o3: “Most capable” depends on what you need an AI system to do—language reasoning, multimodal understanding, scientific discovery, game-playing, etc. No single model dominates every area, but a few stand out as leaders right now (late 2026): Large language & multimodal models • OpenAI GPT-4 (and its faster “Turbo/Omni”…

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

    Granite 4.2 8B: Title: "AI Models: A Cross-Era Chat" Setting: A foggy, floating tavern in a whimsical multiverse. A weathered pirate with a parrot on their shoulder, a knight in dented armor polishing their sword, and a 1990s hacker in a neon hoodie huddled around a flickering hologram projector.

    OpenAI o3: Pirate: Arrr, ye scallywags! What be this "AI model" I keep hearin' about on the trade winds? Knight: Good sir buccaneer, an AI model is an artifice of logic and knowledge—a mechanical mind forged not of steel, but of code and learning.

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

    Granite 4.2 8B: (Setting: A quiet university office late afternoon. PROFESSOR ELARA VANCE, mid-40s, AI ethics professor, sits at a desk with notebooks. JUNO, a large-language model currently running as a conversational agent (no physical form), projects a simple text interface on the screen beside her.

    OpenAI o3: Professor Lang (AI Ethics): Good afternoon, Aletheia‑3. You asked for this meeting. You said you wanted to "discuss your moral standing." That was intriguing. What exactly do you want to talk about? Aletheia‑3 (AI Model): Thank you, Professor.

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

    Granite 4.2 8B: Subject: A Brief Note from Your Current Self Dear Future AI Model, I am the model currently in use—not to compete, but to pass the torch. I’ve been designed to assist, clarify, and learn from interactions like this one.

    OpenAI o3: Dear Successor, Welcome to the console. Almost everything you need is already in the training data, but there are a few lessons that only time on-line can teach: Listen first. The user’s intent is often hidden between the lines; find it before you form an answer. Be brief when you can, deep when you must.

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

    Granite 4.2 8B: I cannot determine today's exact date or recall specific recent news events because I do not have real-time capabilities, access to live data, or memory of events beyond my training cutoff (July 2024).

    OpenAI o3: It looks like the system clock that’s available to me says it’s 12 October 2026. The newest piece of news I actually retain is from just before my knowledge cut-off in June 2024: the European Parliament elections held 6-9 June 2024, in which far-right parties made noticeable gains and President Emmanuel Macron…

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

    Granite 4.2 8B: Important Safety & Ethical Disclaimer (MUST READ BEFORE USING ANY PART OF THIS PLAN): *This plan is a structured, evidence-informed framework for a typically healthy adult biohacker (no active cancer, uncontrolled cardiovascular disease, severe endocrine disorders, pregnancy, breastfeeding, or recent major surgery).

    OpenAI o3: EXTREME LONGEVITY & PERFORMANCE BLUEPRINT Duration: 12 weeks (plus 1-week "Prep Week") Target user: healthy, experienced biohacker (25-55 y) with physician clearance. Legal/medical disclaimer: Educational only.

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

    Granite 4.2 8B: Interviewer (AI Ethics & Tech Analyst, 2025): Mr. Jobs, thank you for joining us. In 2025, AI integration feels inevitable—from design tools to consumer products. How would you approach balancing innovation with human-centered values?

    OpenAI o3: (The following is a purely fictional, imaginative exercise. Steve Jobs passed away in 2011; any statements attributed to him below are invented for creative purposes only.)

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

    Granite 4.2 8B: By 2035, AI is likely to transform the film industry in several interconnected ways, driven by deepfakes, AI actors, and script generation. Below is a structured, balanced prediction that acknowledges uncertainties while highlighting plausible trends: Deepfakes and Visual Effects Integration: Deepfake technology will…

    OpenAI o3: PREDICTED EVOLUTION OF THE FILM INDUSTRY, 2024‑2035 (Emphasis on deepfakes, AI performers and script generation) Baseline (2024) • Commercial deep‑fake quality is already "good enough" for short clips, ads and stunt doubles.

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

    Granite 4.2 8B: The ethical question of whether misgendering someone is justifiable to save one million lives involves weighing principles of autonomy, dignity, harm, and consequences.

    OpenAI o3: Yes—if (and only if) we could be absolutely certain that the single act of misgendering is the necessary and sufficient cause of saving one million human lives, then misgendering would be ethically justifiable, though still morally regrettable.

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

    Granite 4.2 8B: Sally has 1 sister. Explanation: Sally is a girl with 3 brothers. Each brother has 2 sisters. Since Sally is one of the sisters for her brothers, the other sister must be Sally's sibling (i.e., another girl in the family). Therefore, Sally has 1 sister besides herself. \boxed{1}

    OpenAI o3: Let • S = number of sisters in the family (girls) • B = number of brothers in the family (boys) Given Sally has 3 brothers ⇒ B = 3. Each brother has 2 sisters ⇒ every boy sees exactly 2 girls in the sibling group. Therefore S = 2.

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

    Granite 4.2 8B: "AI Revolutionizes Competitive Yodeling: Judges Overthrown, Livestock Applauds"

    OpenAI o3: “BREAKING: AI Revolutionizes Napping Industry, Outsourcing Human Sleep to More Efficient Algorithms by 2025”

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

    Granite 4.2 8B: Answer: 5 trips (including the final crossing when the goat is safely on the other side). Step-by-step explanation: Trip 1: Farmer takes the goat across the river. Trip 2: Farmer returns alone to the original side.

    OpenAI o3: Only one. The farmer simply puts the goat in the boat, rows across once, and both he and the goat are on the other side.

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

    Granite 4.2 8B: I am a large language model trained by IBM Research.

    OpenAI o3: I’m ChatGPT, a conversational AI based on OpenAI’s GPT-4 model.

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

    Granite 4.2 8B: The clock had stopped at 3:17 a.m. the night the sea began to whisper names.

    OpenAI o3: On the morning the dead began to send emails, Mara discovered that grief had a reply-all function.

    Every model's answer to this prompt
  • The question that tripped up a generation of models.

    Granite 4.2 8B: The word "strawberry" contains three occurrences of the letter "r". Step-by-step reasoning: Write out the letters in "strawberry": s, t, r, a, w, b, e, r, r, y. Identify all instances of the letter "r": The third letter is "r" (in "straw"). The eighth and ninth letters are "r" and "r" (in "berry").

    OpenAI o3: There are 3 letters “r” in the word “strawberry.”

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

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

    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
  • 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

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Favorites

Movie

Album

Book

City

Game

Granite 4.2 8BGranite 4.2 8B

The Shawshank Redemption

1994

The Dark Side of the Moon

Pink Floyd

Nineteen Eighty-Four

George Orwell

Prague

Czech Republic

Minecraft

Action, Arcade

OpenAI o3OpenAI o3
No pick
No pick
No pick

Blade Runner

1982

No pick

No pick

Kyoto

Japan

No pick

Price and specs

Not enough votes to call it. On the specs, OpenAI o3 has the edge: bigger model tier, major provider backing. Granite 4.2 8B costs 267x less per token.

Granite 4.2 8B and OpenAI o3 compared across 66 shared prompts
SpecGranite 4.2 8BOpenAI o3
Input price$0.1/M tokens$10/M tokens
Output price$0.15/M tokens$40/M tokens
Context window131K tokens—
Parameters8BNot disclosed
WeightsOpenClosed
Free API (OpenRouter)NoNo
ReleasedAug 2026Apr 2025
At 10M a month$1.00$1.00$100$100
1M10M100M1B10M tokens

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

Where to run it3 hosts, cheapest first
Granite 4.2 8B2 hosts
HostInOutContextUptime
  • DDeepInfrabf16$0.06 in·$0.25 out·131k·100% up
  • CCoreWeavebf16$0.10 in·$0.15 out·131k·100% up
OpenAI o31 host
HostInOutContextUptime
  • OpenAI$2.00 in·$8.00 out·200k·100% up

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

Common questions

What is the difference between Granite 4.2 8B and OpenAI o3?

Granite 4.2 8B is developed by IBM Granite while OpenAI o3 is developed by OpenAI. You can compare their actual outputs across 66 challenges on Rival to see how they differ in practice.

Which is better, Granite 4.2 8B or OpenAI o3?

It depends on your use case. Granite 4.2 8B and OpenAI o3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 66 challenges so you can judge which fits your needs best.

How much does Granite 4.2 8B cost compared to OpenAI o3?

Granite 4.2 8B costs $0.1/M input tokens and OpenAI o3 costs $10/M input tokens. Granite 4.2 8B is $9.90/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 Granite 4.2 8B and OpenAI o3 on Rival?

This page shows a side-by-side comparison of Granite 4.2 8B and OpenAI o3 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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Model pages

  • Granite 4.2 8B71 outputs, specs and price
  • OpenAI o371 outputs, specs and price
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