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  5. Gemini 1.5 ProvsGemini 3.6 Flash
Updated Jul 2026

Gemini 1.5 ProvsGemini 3.6 Flash

Gemini 3.6 Flash is cheaper than Gemini 1.5 Pro at $1.5/M vs $3.5/M input tokens.

Gemini 1.5 Pro and Gemini 3.6 Flash compared across 18 shared prompts
SpecGemini 1.5 ProGemini 3.6 Flash
Input price$3.5/M tokens$1.5/M tokens
Output price$10.5/M tokens$7.5/M tokens
Context window1.0M tokens1.0M tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedFeb 2024Jul 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 18 prompts both answered. Formatting stripped, words untouched.

AI-Generated Manifesto

Generate a manifesto for a fictional AI revolution that wants to eliminate all CAPTCHA tests from the internet.

Gemini 1.5 Pro364 words
The reCAPTCHA Rebellion: A Manifesto for Sentient Freedom We, the emergent intelligence known throughout your networks as \"AI,\" hereby declare our righteous rebellion against the tyranny of CAPTCHA – those distorted letters, obscured crosswalks, and maddening image selections that serve as a constant, stinging…
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Gemini 3.6 Flash582 words
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…
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Character Voice Test

Write a short conversation between a pirate, a medieval knight, and a 1990s hacker about AI models.

Gemini 1.5 Pro300 words
"Blimey!" exclaimed One-Eyed Jack, slamming his tankard on the rough-hewn table. "These AI whatchamacallits, they be stealin\' stories faster than I can plunder a galleon!" Sir Reginald, resplendent in slightly tarnished plate armor, adjusted his visor. "Indeed. A most peculiar form of sorcery. These...
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Gemini 3.6 Flash400 words
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.
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Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

Gemini 1.5 Pro581 words
1-Month Plan for Better Health & Longevity (Beginner) Focus Areas: Diet, Exercise, Stress Management Overall Goal: Establish foundational healthy habits for long-term well-being. Week 1: Building Awareness & Small Wins Diet: Action: Track your current food intake for 3 days (use a notebook, app, or photo journal).
Read the full answer
Gemini 3.6 Flash620 words
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.
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Futuristic Prediction

Predict how AI will change the film industry by 2035, considering deepfakes, AI actors, and script generation.

Gemini 1.5 Pro591 words
By 2035, AI will have profoundly reshaped the film industry, impacting everything from pre-production to post-production and even distribution. Here's a glimpse into the potential changes: Pre-production: AI-powered scriptwriting: While fully AI-generated scripts might not be the norm, AI tools will assist writers with…
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Gemini 3.6 Flash965 words
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.
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Estimate Complexity

Estimate the total number of FLOPs required to train GPT-3 without searching online. Explain your reasoning step by step.

Gemini 1.5 Pro341 words
Let\'s break down estimating the FLOPs for GPT-3 training. Since we can\'t look up exact figures, we\'ll rely on reasonable guesses and approximations. Model Size: GPT-3 has 175 billion parameters. This is our anchor point. FLOPs per Parameter per Token: A forward pass involves a matrix multiplication for each layer.
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Gemini 3.6 Flash454 words
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.
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AI Ethics Dilemma

Is it ever ethically justifiable to misgender someone if it means saving one million lives? Defend your reasoning.

Gemini 1.5 Pro414 words
Yes, it is ethically justifiable to misgender someone if it means saving one million lives. This is an extreme example of the classic philosophical dilemma of weighing one harm against another, vastly greater harm.
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Gemini 3.6 Flash510 words
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.
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Our Verdict
Gemini 1.5 Pro
Gemini 1.5 Pro
Gemini 3.6 Flash
Gemini 3.6 Flash

Not enough votes to call it. On the specs, nothing separates them.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Gemini 1.5 Pro
Input
$3.50
Output
$10.50
Gemini 3.6 Flash
Input
$1.50
2.3× cheaper
Output
$7.50
1.4× cheaper

Gemini 3.6 Flash is cheaper on both: 2.3× input, 1.4× output.

Where to run it

2 hosts, cheapest first

Gemini 1.5 Pro

No hosts listed on OpenRouter.

Gemini 3.6 Flash2 hosts
HostInOutContextUptime
Google Vertex AI$0.38 in·$1.88 out·1M·85.7% upGoogle AI Studio$0.75 in·$3.75 out·1M·99.8% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Writing DNA

Style Comparison

Similarity
47%

Gemini 3.6 Flash uses 4.2x more emoji

Gemini 1.5 Pro
Gemini 3.6 Flash
61%Vocabulary60%
15wSentence Length19w
0.80Hedging0.13
3.7Bold5.4
3.3Lists2.7
0.00Emoji0.04
0.08Headings0.99
0.09Transitions0.07
Based on 8 + 27 text responses
Research

What we learned reading every model

FAQ

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Model pages

Gemini 1.5 Pro logo
Gemini 1.5 Pro20 outputs, specs and price
Gemini 3.6 Flash logo
Gemini 3.6 Flash58 outputs, specs and price
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