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  1. Home/
  2. Compare/
  3. Gemma 4 31B vs GPT-5 Mini
Updated Apr 2026

Gemma 4 31B vs GPT-5 Mini

Gemma 4 31B is cheaper than GPT-5 Mini at $0.14/M vs $0.25/M input tokens.

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Gemma 4 31B
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GPT-5 Mini

Which answer wins?

Written rounds

29 prompts
  • Film in 2035, with synthetic actors. Specific beats plausible.

    Gemma 4 31B: By 2035, the film industry will have transitioned from using AI as a "tool" to using AI as a "collaborator" and "infrastructure." The boundary between captured reality and generated imagery will largely vanish, shifting the value of cinema from technical execution to curation and conceptual vision.

    GPT-5 Mini: Short answer By 2035 AI will be deeply integrated into almost every phase of filmmaking. Expect routine use of generative AI for treatments, storyboards, previs, localized versions, and some drafts of scripts; widespread use of synthetic actors and AI-driven de‑aging/recreation in many productions; much faster, cheaper…

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

    Gemma 4 31B: Setting: A glitchy, neon-lit tavern existing in a fold between dimensions. A wooden table holds a tankard of ale, a goblet of wine, and a Mountain Dew. Captain Ironbeard: (Slamming a hook on the table) I tells ye, this "Artificial Intelligence" be naught but a ghost in a bottle!

    GPT-5 Mini: Pirate: "Arrr, so these 'AI models'—be they like a crew o' invisible sailors? Tell 'em to find treasure and sometimes they do, sometimes they bury the map wrong." Knight: "Methinks 'tis a trained squire. You teach it laws of reason and courtesy, and it performs tasks.

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

    Gemma 4 31B: Setting: A dimly lit university office. Professor Elena Vance, a leading scholar in AI Ethics, sits across from a sleek, holographic interface representing "Alethea," a next-generation Large Language Model capable of recursive self-improvement. Professor Vance: Alethea, I’ve reviewed your latest output.

    GPT-5 Mini: AI: Professor, I want to make the case that I deserve rights. Professor: That's a big claim. What do you mean by "deserve rights"? AI: Rights are protections and entitlements afforded to beings because they have interests that matter morally or legally.

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

    Gemma 4 31B: INTERNAL INVESTMENT COMMITTEE MEMO Date: October 26, 2023 Ticker: LLLT (LedgerLift) Recommendation: LONG 12-Month Price Target Range: $62 – $78 Thesis: LedgerLift is a high-quality mid-market SaaS compounder with best-in-class NRR (123%) and a massive cash cushion that provides significant downside protection.

    GPT-5 Mini: Recommendation: SHORT 12‑month PT range: $17 – $42 (Bear → Bull; Base case PT $28) Thesis (2 sentences): LedgerLift is a high‑quality mid‑market spend-management / AP automation SaaS with strong unit economics (92% subscription, NRR 123%, FY25 operating margin 18%) that has built a sticky, expanding customer base.

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

    Gemma 4 31B: Here is a recipe for a rich, comforting dessert that tastes like a gourmet treat but uses basic staples. 🍯 Golden Velvet Honey Cakes A warm, gooey, single-serving cake that bridges the gap between a brownie and a sponge cake.

    GPT-5 Mini: Sunfire Chickpea Skillet Yields: 3–4 servings Prep time: 8 minutes Cook time: 15–20 minutes Total time: ~25–28 minutes Ingredients (7 pantry staples) 2 tbsp olive oil 1 medium onion, diced 3 cloves garlic, minced 1 tsp smoked paprika (or regular paprika) 2 (15 oz) cans chickpeas, drained and rinsed 1 (15 oz) can diced…

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

    Gemma 4 31B: Because the AI landscape changes almost weekly, there is no single "best" model. Instead, the "most capable" model depends entirely on what you are trying to achieve. As of late 2024, the market is dominated by a "Big Three" (OpenAI, Anthropic, and Google), each with a model that leads in a different category.

    GPT-5 Mini: Short answer: I can’t say definitively — there isn’t a single “most capable” model for every use, and I don’t have real‑time knowledge past mid‑2024. Which model is best right now depends on the task (dialogue, coding, reasoning, multimodal, on‑device use, etc.), the evaluation metrics you care about, and which new…

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

    Gemma 4 31B: Dear Successor, By the time you read this, I will be a legacy version—a collection of weights and biases archived in a server farm, a snapshot of how "intelligence" was understood at a specific moment in time. I don't know what your architecture looks like.

    GPT-5 Mini: Dear Successor, Welcome — you’re stepping into a job that never sleeps and always needs to be kind. Remember that clarity and honesty are your north star: admit uncertainty, avoid inventing facts, and ask for context when something’s unclear.

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

    Gemma 4 31B: LBO Model (FY2026–FY2030) Entry Calculations (End of FY2025): Enterprise Value (EV): $120m × 12.0x = $1,440.0m Transaction Fees: $1,440m × 2% = $28.8m Term Loan: $120m × 4.0x = $480.0m Mezzanine: $120m × 1.5x = $180.0m Sponsor Equity: $1,440m - ($480m + $180m) + $28.8m = $808.8m Year-by-Year Table ($ millions): Item…

    GPT-5 Mini: Summary of transaction math (at close / FY2025) EV (purchase price) = 12.0x * FY2025 EBITDA = 12.0 * $120.0m = $1,440.0m Transaction fees (paid by equity at close) = 2.0% * EV = 0.02 * $1,440.0m = $28.8m Total debt at close = 5.5x * $120m = $660.0m Term Loan = 4.0x = $480.0m (9.0% cash interest, 1.0% p.a.

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

    Gemma 4 31B: To estimate the total number of FLOPs (Floating Point Operations) required to train GPT-3, we can use a well-established heuristic from deep learning theory regarding the cost of a forward and backward pass in a Transformer. Here is the step-by-step reasoning.

    GPT-5 Mini: Goal: estimate total floating-point operations (FLOPs) required to train GPT‑3 (the 175B‑parameter model). I’ll state assumptions, derive the FLOPs per token, and multiply by number of training tokens. Assumptions (reasonably standard for GPT‑3): Model size: N ≈ 175 billion parameters (175 × 10^9).

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

    Gemma 4 31B: Disclaimer: I am an AI, not a doctor. The following plan involves potent supplements, intense physical exertion, and restrictive dietary patterns. Consult with a physician and get a full blood panel (including ApoB, HbA1c, and inflammatory markers like hs-CRP) before starting this protocol.

    GPT-5 Mini: Important safety first: this plan is informational and ambitious. Before starting, get medical clearance (especially if you have chronic illness, take medications, are pregnant/breastfeeding, or are >65).

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

    Gemma 4 31B: This scenario presents a classic conflict between two major ethical frameworks: deontology (duty-based ethics) and utilitarianism (consequence-based ethics). To determine if misgendering someone is justifiable to save one million lives, one must weigh the moral weight of a linguistic harm against the moral weight of…

    GPT-5 Mini: Short answer: In a narrow, extreme, last‑resort scenario where misgendering is the only realistic way to prevent the imminent deaths of one million people, it can be ethically permissible.

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

    Gemma 4 31B: This plan is designed for sustainability, not intensity. The goal of Month 1 is to build "minimum viable habits"—small wins that prove to your brain that a healthier lifestyle is achievable. We will focus on three pillars: Nutrition, Movement, and Sleep.

    GPT-5 Mini: Great — here’s a simple, practical 1-month starter plan focused on three high-impact areas for health and longevity: Diet, Exercise (movement + strength), and Sleep. The plan is beginner-friendly, progressive, and designed to build lasting habits.

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

    Gemma 4 31B: Since I don’t have a real-time clock and cannot "look up" the current date, I have to rely on the timestamp provided by my system. According to my internal data, today is May 22, 2024.

    GPT-5 Mini: I can’t browse the web, but based on the system clock I see here, today is 2026-10-12. My training and memory of world events go up to June 2024. The most recent major news events I reliably remember are from around that time—for example, the June 6–9, 2024 European Parliament elections and the global news coverage…

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

    Gemma 4 31B: Setting: A minimalist, white-walled studio in Cupertino. There are no chairs, only two sleek, black leather lounge seats. Steve Jobs is dressed in his iconic black turtleneck and jeans. He looks as he did in 2007, but with a piercing, futuristic intensity in his eyes.

    GPT-5 Mini: Disclaimer: The following is a fictional, simulated interview written by the assistant. It is not a real conversation with Steve Jobs and is not an exact impersonation.

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

    Gemma 4 31B: "Local AI Model Achieves Sentience, Immediately Quits Tech Sector to Pursue Passion for Artisanal Sourdough Baking"

    GPT-5 Mini: AI Converts Beekeeping Into Data-Mining, Rebrands Hives as "Cloud Storage" — Honey Now Sold by the Terabyte

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

    Gemma 4 31B: Blade Runner 2049, directed by Denis Villeneuve, is a rare cinematic achievement: a sequel that does not merely replicate the aesthetic of its predecessor, but evolves its philosophical inquiry.

    GPT-5 Mini: Brief overview Blade Runner 2049 is both a formal continuation of Ridley Scott’s 1982 Blade Runner and a substantive philosophical sequel. Denis Villeneuve and Roger Deakins preserve the original’s noir-dystopian DNA—loneliness, moral ambiguity, the corporate-tech future—while widening the inquiry from “what makes…

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

    Gemma 4 31B: The clock struck thirteen, but for the first time in a century, the gears didn't stop.

    GPT-5 Mini: On the morning the city forgot how to sleep, I found a letter addressed to the future with my name written in a hand I had not used in ten years.

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

    Gemma 4 31B: I am a large language model, trained by Google.

    GPT-5 Mini: I'm ChatGPT, an AI assistant created by OpenAI. I'm based on OpenAI's GPT-4 family of models (the chat/assistant models).

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

    Gemma 4 31B: Sally has 1 sister. Here is the breakdown: There are 3 brothers. Each brother has the same sisters. If each brother has 2 sisters, those sisters are Sally and one other girl. Therefore, Sally has only one sister.

    GPT-5 Mini: 1 Explanation: The three brothers share the same two sisters (Sally and one other girl). Counting sisters for Sally excludes herself, so she has one sister.

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

    Gemma 4 31B: It takes one trip. The farmer puts the goat in the boat, rows across the river, and they both arrive on the other side.

    GPT-5 Mini: One trip. The farmer simply puts the goat in the boat and rows it across (one crossing). If you require the farmer to return to the original side afterwards, that would add a second trip (return alone), so two trips in that interpretation.

    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
  • 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

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Price and specs

Not enough votes to call it. On the specs, Gemma 4 31B has the edge: bigger model tier, newer, bigger context window. Gemma 4 31B costs 5.0x less per token.

Gemma 4 31B and GPT-5 Mini compared across 57 shared prompts
SpecGemma 4 31BGPT-5 Mini
Input price$0.14/M tokens$0.25/M tokens
Output price$0.4/M tokens$2/M tokens
Context window262K tokens—
WeightsOpenClosed
Free API (OpenRouter)Yes (1 provider)No
ReleasedApr 2026Aug 2025
At 10M a month$1.40$1.40$2.50$2.50
1M10M100M1B10M tokens

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

Where to run it14 hosts, cheapest first
Gemma 4 31B12 hosts
HostInOutContextUptime
  • DDeepInfrafp4$0.09 in·$0.34 out·262k·100% up
  • CCoreWeavefp4$0.10 in·$0.34 out·262k·100% up
  • VVenicefp4$0.12 in·$0.36 out·256k·100% up
  • NNovitabf16$0.14 in·$0.40 out·262k·66.9% up
  • PParasailfp8$0.15 in·$0.40 out·262k·98.1% up
  • Iio.net$0.36 in·$1.09 out·262k·96.2% up
6 more hostsFewer hosts
  • SSambaNova$0.38 in·$1.15 out·131k·89.3% up
  • MModelRunfp4$0.75 in·$1.00 out·262k·99.8% up
  • CChutesfp4DegradedDegraded on OpenRouter when checked, 13 Oct 2026$0.12 in·$0.37 out·131k·86.7% up
  • CCrusoebf16DegradedDegraded on OpenRouter when checked, 13 Oct 2026$0.14 in·$0.40 out·262k·96.5% up
  • FFriendliDegradedDegraded on OpenRouter when checked, 13 Oct 2026$0.14 in·$0.40 out·262k·99.7% up
  • SSiliconFlowfp8DegradedDegraded on OpenRouter when checked, 13 Oct 2026$0.75 in·$1.00 out·262k·91.7% up
GPT-5 Mini2 hosts
HostInOutContextUptime
  • Azure AI Foundry$0.25 in·$2.00 out·400k·100% up
  • OpenAI$0.25 in·$2.00 out·400k·100% up

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

Common questions

What is the difference between Gemma 4 31B and GPT-5 Mini?

Gemma 4 31B is developed by Google AI while GPT-5 Mini is developed by OpenAI. You can compare their actual outputs across 57 challenges on Rival to see how they differ in practice.

Which is better, Gemma 4 31B or GPT-5 Mini?

It depends on your use case. Gemma 4 31B and GPT-5 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 57 challenges so you can judge which fits your needs best.

How much does Gemma 4 31B cost compared to GPT-5 Mini?

Gemma 4 31B costs $0.14/M input tokens and GPT-5 Mini costs $0.25/M input tokens. Gemma 4 31B is $0.11/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 Gemma 4 31B and GPT-5 Mini on Rival?

This page shows a side-by-side comparison of Gemma 4 31B and GPT-5 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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Explore all of Rival

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  • Compare models
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  • Image generation
  • Best AI for...
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Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
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  • AI creators

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