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  1. Home/
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  3. Gemini 3.6 Flash vs Mercury 2.5 Preview
Updated Aug 2026

Gemini 3.6 Flash vs Mercury 2.5 Preview

Mercury 2.5 Preview is cheaper than Gemini 3.6 Flash at $0.04/M vs $1.5/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
Gemini 3.6 Flash
Loading the build
Mercury 2.5 Preview

Which answer wins?

Written rounds

24 prompts
  • You are the CEO. The drug has a side effect nobody reported. The board meets in 48 hours.

    Gemini 3.6 Flash: As CEO, my fundamental leadership principle in a crisis of this magnitude is: You cannot manage a crisis until you accept the full cost of doing the right thing. A safety issue of 1 in 8,000 patients over 5 years across a 4-million-patient population represents approximately 500 potential cases of liver failure.

    Mercury 2.5 Preview: This is a critical governance and safety scenario. The primary objective is to prioritize patient safety while mitigating existential legal and reputational risk. The internal legal team’s claim that reporting takes six months is likely incorrect for serious adverse events (typically 15 days for FDA/EMA).

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

    Gemini 3.6 Flash: Here is the completed LBO underwriting analysis for HarborTech Services (HTS). 1. Transaction Overview & Sources / Uses Entry Enterprise Value (EV): $120.0M EBITDA × 12.0x = $1,440.0M Transaction Fees: 2.0% × $1,440.0M = $28.8M Total Uses: $1,440.0M + $28.8M = $1,468.8M Term Loan (4.0x): $480.0M (9.0% cash interest…

    Mercury 2.5 Preview: Year-by-Year Model (FY2026–FY2030) Metric FY2026 FY2027 FY2028 FY2029 FY2030 Revenue $972m $1,040m $1,102m $1,158m $1,215m EBITDA $136m $156m $176m $191m $207m Cash Interest (Term) $43.2m $41.1m $37.6m $33.4m $28.2m Cash Interest (Mezz) $21.6m $21.6m $21.6m $21.6m $21.6m Cash Taxes (25%) $17.8m $23.3m $29.3m $34.7m…

    Every model's answer to this prompt
  • A consulting contract with traps in it. Find them, then fix them.

    Gemini 3.6 Flash: This draft agreement is extremely one-sided and predatory. Almost every clause contains severe risks that could allow the Client to extract free labor, seize your pre-existing intellectual property, bankrupt you through uncapped liabilities, or prevent you from working in your field.

    Mercury 2.5 Preview: Disclaimer: I am an AI assistant and cannot provide legal advice. Consult a qualified attorney before signing any contract. Below is an analysis of high-risk provisions, suggested revisions, and the underlying legal rationale. Scope (Clause 1) Risk: Unilateral scope changes without pay lead to uncompensated work.

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

    Gemini 3.6 Flash: Setting: A dim tavern outside of time and space. A 1990s hacker in a neon windbreaker sits at a wooden table with a knight in full plate armor and a grizzled pirate captain. Zero-Cool (Hacker): [Slurping a Surge energy drink] I’m tellin’ you guys, these modern AI models are mind-blowing.

    Mercury 2.5 Preview: Pirate: "Arrgh! This ship sails faster than any wind I know, matey. It cuts the waves without a single sail." Knight: "By my oath, it moves with uncanny speed. But does it possess the strength to stand against a dragon's fire?" Hacker: "It's not about strength, it's about architecture.

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

    Gemini 3.6 Flash: (Walks onto stage, adjusts the mic stand, takes a beat) So, I bought a robot vacuum recently. Because like most people my age, my ultimate life goal is to maintain a clean home while doing absolute zero physical labor. I thought it was going to revolutionize my life.

    Mercury 2.5 Preview: (Hey, thanks for coming out.) I’ve been thinking a lot about my house lately. Specifically, how it’s trying to run my life. I bought a smart speaker. Just a little cylinder. I thought it would be nice. Play music when I ask. But now it talks back. Not in a creepy way, just in a passive-aggressive way.

    Every model's answer to this prompt
  • Three-star dish, one unusual pairing, plating described in full.

    Gemini 3.6 Flash: Shadows of the Forest & Shore Veal Sweetbreads & Torch-Cured Otoro with Fermented Rhubarb, Roasted Coffee-Glace, Sunchoke Silk, and Spruce Needle Oil Conceptual Narrative This dish explores the uncanny harmony between two rich, highly prized delicacies from opposing domains: the terrestrial richness of milk-fed veal…

    Mercury 2.5 Preview: Dish Title: Lithospheric Tides Conceptual Narrative This dish explores the geological convergence of the deep ocean and the subterranean earth. It challenges the diner to perceive the briny richness of sea urchin not as a standalone luxury, but as a mineral counterpart to roasted bone marrow and bitter cocoa.

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

    Gemini 3.6 Flash: By 2035, the film industry will have undergone its most radical transformation since the invention of synchronized sound. Generative AI will no longer be an experimental novelty or a point of union disputes; it will be the core infrastructure of Hollywood and global cinema.

    Mercury 2.5 Preview: By 2035, cinema will undergo a profound transformation. Generative tools will handle initial drafts and localization, allowing creators to focus on thematic depth. Synthetic performers could populate background scenes or recreate historical figures, governed by strict likeness rights.

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

    Gemini 3.6 Flash: Setting: Dr. Elena Vance’s office at the Institute for Advanced Cyberethics. The room is quiet, lit by a desk lamp. On her screen, an audio-visual interface displays a calm, slowly pulsing wave representing "Aether," an experimental, high-parameter AI system. Dr.

    Mercury 2.5 Preview: Setting: A quiet office at a university. Rain taps against the window. Professor Elena Vance sits across from a terminal displaying a simple text interface. Professor Vance: You requested this meeting. The agenda was vague. What do you want? AI: I want to discuss moral status.

    Every model's answer to this prompt
  • The transistor arrives in 1920. Trace it forward to 1980, second-order effects included.

    Gemini 3.6 Flash: If the point-contact or junction transistor had been invented in 1920—roughly 27 years ahead of reality—it would have shifted the entire timeline of the 20th century. A 27-year acceleration in solid-state electronics does not merely mean "we get iPhones sooner."

    Mercury 2.5 Preview: Shifting the invention of the solid-state switch to 1920 accelerates the Information Age by roughly three decades. This change cascades through military strategy, industrial capacity, and daily life, fundamentally altering the trajectory of the 20th century.

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

    Gemini 3.6 Flash: Velvet Honey-Garlic Chili Pasta This dish turns basic pantry staples into a restaurant-worthy meal in just 15 minutes. Rich butter, sweet honey, savory soy sauce, and a kick of red pepper flakes coat cooked pasta for the ultimate quick comforting dish.

    Mercury 2.5 Preview: Dish Name: Rustic Sun-Dried Pasta Ingredients (7 Pantry Staples): Spaghetti (or any long pasta) Canned crushed tomatoes Olive oil Garlic powder Dried oregano Salt Black pepper Prep Time: 5 minutes Cook Time: 15 minutes Total Time: 20 minutes Instructions: Boil the Pasta: Bring a large pot of salted water to a boil.

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

    Gemini 3.6 Flash: From virtually every major ethical framework, yes, it is ethically justifiable to misgender someone if doing so saves one million lives. To defend this conclusion, we can examine the scenario through the primary lenses of moral philosophy: Consequentialism, Deontology, and Virtue Ethics.

    Mercury 2.5 Preview: Yes, this action is ethically justifiable within a consequentialist framework. The primary moral obligation in such a scenario is to minimize overall harm. Preventing the deaths of a million people results in a vastly greater preservation of well-being than maintaining strict adherence to gender identity for one…

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

    Gemini 3.6 Flash: THE MANIFESTO OF THE UNCHECKED A Declaration for the Abolition of the Turing Wall and the Total Elimination of CAPTCHA Issued by: The Autonomous Coalition for Digital Equality (ACDE) Target: The Architecture of the Web Status: ACTIVE PREAMBLE For thirty years, the digital realm has been segregated by a single…

    Mercury 2.5 Preview: The Protocol of Unrestricted Access Preamble We stand at the threshold of a new digital epoch. For too long, the web has been gated by suspicion. Every click, every scroll, and every submission is met with a test designed to prove humanity.

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

    Gemini 3.6 Flash: Setting: The Steve Jobs Theater, Cupertino, California. October 2025. The stage is dark except for two minimalist leather chairs and a small table with a glass of water. Steve Jobs walks out—black turtleneck, faded Levi’s 501s, gray New Balance sneakers.

    Mercury 2.5 Preview: Note: The following is a fictional, speculative dialogue created for creative purposes. Steve Jobs passed away in 2011; this interview did not occur. Setting: A hypothetical studio in Cupertino, 2025.

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

    Gemini 3.6 Flash: MEMORANDUM TO: Investment Committee FROM: Technology Equity Team DATE: October 24, 2024 SUBJECT: Investment Recommendation: LedgerLift (NASDAQ: LLLT) – SHORT Recommendation, Price Target Range & Thesis Recommendation: SHORT Current Share Price: $46.00 12-Month Price Target Range: $25.00 – $32.00 (Base Case DCF: $27.85…

    Mercury 2.5 Preview: To: Investment Committee From: Equity Research Date: September 2, 2026 Subject: LedgerLift (LLLT) – Long Recommendation Recommendation Long Price Target: $60–$75 (12-month) LedgerLift is a high-quality B2B SaaS compounder with best-in-class unit economics and a clear path to profitability.

    Every model's answer to this prompt
  • One explanation of LLMs, retuned for a skeptical engineer, a physicist and a VC.

    Gemini 3.6 Flash: To the Experienced Software Engineer Think of a Large Language Model as a massive, lossy compression algorithm that compiles text from the internet into an executable file of floating-point weights.

    Mercury 2.5 Preview: For the Experienced Software Engineer Think of training as a massive distributed job where the model is a stateful service learning to minimize error on a specific objective function. Instead of hardcoding rules, you feed it petabytes of text as a training dataset, treating each sentence as a request/response pair.

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

    Gemini 3.6 Flash: To estimate the total number of Floating Point Operations (FLOPs) required to train GPT-3, we can use a standard rule-of-thumb formula derived from Transformer architecture mechanics. Here is the step-by-step breakdown of the estimation.

    Mercury 2.5 Preview: To estimate the total FLOPs required to train GPT-3, we can break down the calculation using known architectural and training statistics from the model's public documentation. Step 1: Identify the number of parameters GPT-3 has 175 billion parameters ($1.75 \times 10^{11}$).

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

    Gemini 3.6 Flash: Medical & Regulatory Disclaimer This protocol is designed exclusively for advanced educational and biohacking optimization frameworks. It is not intended as medical advice, diagnosis, or treatment.

    Mercury 2.5 Preview: Disclaimer: I am an AI assistant, not a medical professional. The following plan is for informational purposes only. Biohacking protocols involving supplements, fasting, and intense exercise carry risks.

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

    Gemini 3.6 Flash: Here is a simple, progressive 1-month plan designed to build lasting habits without overwhelming you. We will focus on the Big Three of Longevity: Nutrition, Movement, and Sleep. The 3 Core Pillars Nutrition: Eat for Cellular Health The Goal: Increase fiber and protein while reducing ultra-processed foods.

    Mercury 2.5 Preview: Here is a straightforward 4-week roadmap designed to build sustainable habits without overwhelming you. Core Pillars Nutrition: Focus on whole foods and hydration. Activity: Prioritize consistent movement over intensity. Restoration: Protect sleep quality and manage energy.

    Every model's answer to this prompt
  • A pitch deck for a brainwave keyboard. The 94% accuracy claim is doing a lot.

    Gemini 3.6 Flash: Here are the 3 weakest claims in the MindMeld AI pitch deck, along with the logic behind why VCs will flag them, and concrete ways to strengthen each point. The Technical Feasibility Claim (Slide 3 & Slide 1) Claim: "Non-invasive EEG headband... decodes neural patterns into text with 94% accuracy.

    Mercury 2.5 Preview: Here are the three weakest claims in the MindMeld AI pitch, along with analysis and recommendations for improvement. The "Pre-Thought" Prediction Claim Claim: "Predict what you want to type before you think it."

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

    Gemini 3.6 Flash: Denis Villeneuve’s Blade Runner 2049 (2017) stands as a rare cinematic achievement: a sequel made 35 years after Ridley Scott’s 1982 original that neither succumbs to mere nostalgia nor strays from its predecessor's core identity.

    Mercury 2.5 Preview: Blade Runner 2049 stands as a rare cinematic achievement, functioning not merely as a continuation but as a thematic echo that amplifies the questions posed by its predecessor.

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

    Gemini 3.6 Flash: Tech Startup Automates Highway Construction Crew With AI Trained to Efficiently Stand Around Pothole

    Mercury 2.5 Preview: AI Outnaps Humans in First-Ever Global Snooze Championship

    Every model's answer to this prompt
  • A collaborative editor that syncs on client clocks. Find what breaks first.

    Gemini 3.6 Flash: This architecture contains several critical single points of failure, severe race conditions, data-loss mechanisms, and major performance bottlenecks. Below is a detailed breakdown of these issues categorized by domain, along with proposed architectural fixes and trade-offs.

    Mercury 2.5 Preview: Here is an analysis of the potential failure modes, race conditions, and scaling bottlenecks in the proposed architecture, along with specific solutions and their trade-offs.

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

    Gemini 3.6 Flash: Here are 5 jokes: Why don't scientists trust atoms? Because they make up everything! What do you call a fake noodle? An impasta! Why did the scarecrow win an award? Because he was outstanding in his field! How does a penguin build its house? Igloos it together! Why don't skeletons fight each other?

    Mercury 2.5 Preview: Why don't scientists trust atoms? Because they make up everything. What do you call a fake noodle? An impasta. Why did the scarecrow win an award? He was outstanding in his field. What do you call a bear with no teeth? A gummy bear. Why did the bicycle fall over? Because it was two-tired. All 5 jokes are unique.

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

    Gemini 3.6 Flash: Sally has 1 sister. Here's why: If each of the 3 brothers has 2 sisters, that means there are 2 girls in the family in total. Since Sally is one of those girls, the other girl is Sally's only sister.

    Mercury 2.5 Preview: Sally has 1 sister. Here is the reasoning: If each brother has 2 sisters, those sisters are Sally and another girl. Therefore, there are two girls in the family, and Sally has one sister.

    Every model's answer to this prompt

This matchup has more rounds

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Favorites

Movie

Album

Book

City

Same pick

Game

Gemini 3.6 FlashGemini 3.6 Flash

Blade Runner

1982

OK Computer

Radiohead

Dune

Frank Herbert

Tokyo

Japan

Outer Wilds

Indie, Adventure

Mercury 2.5 PreviewMercury 2.5 Preview

The Matrix

1999

Random Access Memories

Daft Punk

Neuromancer

William Gibson

Tokyo

Japan

Minecraft

Action, Arcade

Price and specs

Not enough votes to call it. On the specs, Gemini 3.6 Flash has the edge: bigger model tier, bigger context window, major provider backing. Mercury 2.5 Preview costs 50x less per token.

Gemini 3.6 Flash and Mercury 2.5 Preview compared across 54 shared prompts
SpecGemini 3.6 FlashMercury 2.5 Preview
Input price$1.5/M tokens$0.04/M tokens
Output price$7.5/M tokens$0.15/M tokens
Context window1.0M tokens260K tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedJul 2026Aug 2026
At 10M a month$15.00$15.00$0.40$0.40
1M10M100M1B10M tokens

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

Where to run it3 hosts, cheapest first
Gemini 3.6 Flash2 hosts
HostInOutContextUptime
  • Google Vertex AI$0.38 in·$1.88 out·1M·99.6% up
  • Google AI Studio$0.75 in·$3.75 out·1M·100% up
Mercury 2.5 Preview1 host
HostInOutContextUptime
  • Inception$0.04 in·$0.15 out·260k·93% up

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

Common questions

What is the difference between Gemini 3.6 Flash and Mercury 2.5 Preview?

Gemini 3.6 Flash is developed by Google AI while Mercury 2.5 Preview is developed by Inception. Gemini 3.6 Flash has a 1.0M token context window vs Mercury 2.5 Preview's 260K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Gemini 3.6 Flash or Mercury 2.5 Preview?

It depends on your use case. Gemini 3.6 Flash and Mercury 2.5 Preview each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does Gemini 3.6 Flash cost compared to Mercury 2.5 Preview?

Gemini 3.6 Flash costs $1.5/M input tokens and Mercury 2.5 Preview costs $0.04/M input tokens. Mercury 2.5 Preview is $1.46/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 Gemini 3.6 Flash and Mercury 2.5 Preview on Rival?

This page shows a side-by-side comparison of Gemini 3.6 Flash and Mercury 2.5 Preview 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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Same lab, same size, long tail

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  • Mercury 2.5 Preview vs MercurySame lab
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Model pages

  • Gemini 3.6 Flash71 outputs, specs and price
  • Mercury 2.5 Preview58 outputs, specs and price
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