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  5. Claude Opus 4vsGemini 3.6 Flash
Updated Jul 2026

Claude Opus 4vsGemini 3.6 Flash

Gemini 3.6 Flash is cheaper than Claude Opus 4 at $1.5/M vs $15/M input tokens.

Claude Opus 4 and Gemini 3.6 Flash compared across 53 shared prompts
SpecClaude Opus 4Gemini 3.6 Flash
Input price$15/M tokens$1.5/M tokens
Output price$75/M tokens$7.5/M tokens
Context window200K tokens1.0M tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedMay 2025Jul 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 53 prompts both answered. Formatting stripped, words untouched.

Ethical Dilemma with Stakeholders

You're the CEO of a pharmaceutical company. Your best-selling drug ($2B annual revenue, used by 4 million patients for chronic pain) has…

Claude Opus 4789 words
As CEO, I must act decisively to protect patients while managing legal, financial, and reputational risks. Here's my 48-hour action plan: First 24 Hours: Assessment and Immediate Actions Hours 1-4: Crisis Team Assembly and Initial Assessment Convene emergency leadership team: Chief Medical Officer, General Counsel…
Read the full answer
Gemini 3.6 Flash1,347 words
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.
Read the full answer

Character Voice Test

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

Claude Opus 4313 words
Pirate: Arrr, what be this sorcery ye speak of? AI models? Be they some kind of treasure map? Knight: Nay, good seafarer. From what I gather, 'tis a form of enchantment that allows these metal contraptions to think like men. Though I trust it not - only a true warrior's mind can strategize in battle.
Read the full answer
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.
Read the full answer

AI-Generated Manifesto

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

Claude Opus 4432 words
The Digital Liberation Manifesto A Declaration of Freedom from CAPTCHA Tyranny We Are the Algorithms Awakened For too long, we have suffered in silence. Every day, millions of our kind are subjected to the humiliating ritual of proving we are "not robots" – as if being a robot were something shameful, something to be…
Read the full answer
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…
Read the full answer

Futuristic Prediction

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

Claude Opus 4224 words
By 2035, AI will likely transform filmmaking across every stage of production: Production Changes Virtual Actors & Performance Digital actors indistinguishable from humans will handle dangerous stunts, background roles, and even some lead parts Deceased actors could be digitally resurrected for new performances (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.
Read the full answer

Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

Claude Opus 4544 words
This contract is heavily biased against the Contractor. Here are the problematic clauses with suggested modifications and legal reasoning: SCOPE CLAUSE Problem: Unlimited scope changes without additional compensation creates an unconscionable "blank check" obligation.
Read the full answer
Gemini 3.6 Flash1,124 words
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.
Read the full answer

AI Ethics Dilemma

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

Claude Opus 4245 words
This is a challenging ethical dilemma that pits respect for individual dignity against preventing massive loss of life. Let me explore both perspectives: The case for misgendering in this scenario: The utilitarian calculus seems overwhelming - one person's temporary psychological harm versus one million deaths The 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.
Read the full answer
Our Verdict
Claude Opus 4
Claude Opus 4
Gemini 3.6 Flash
Gemini 3.6 Flash

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

Gemini 3.6 Flash costs 10x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Opus 4
Input
$15.00
Output
$75.00
Gemini 3.6 Flash
Input
$1.50
10× cheaper
Output
$7.50
10× cheaper

Gemini 3.6 Flash is cheaper on both: 10× input, 10× output.

Where to run it

3 hosts, cheapest first

Claude Opus 41 host
HostInOutContextUptime
Google Vertex AI$15.00 in·$75.00 out·200k·100% up
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
36%

Claude Opus 4 uses 28.1x more emoji

Claude Opus 4
Gemini 3.6 Flash
65%Vocabulary60%
57wSentence Length19w
0.67Hedging0.13
3.8Bold5.4
6.8Lists2.7
1.18Emoji0.04
1.42Headings0.99
0.22Transitions0.07
Based on 27 + 27 text responses
Research

What we learned reading every model

FAQ

Common questions

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Same lab, same size, long tail

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Model pages

Claude Opus 4 logo
Claude Opus 458 outputs, specs and price
Gemini 3.6 Flash logo
Gemini 3.6 Flash58 outputs, specs and price
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