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  5. Gemini 3.6 FlashvsOpenAI o4-mini
Updated Jul 2026

Gemini 3.6 FlashvsOpenAI o4-mini

OpenAI o4-mini is cheaper than Gemini 3.6 Flash at $1.1/M vs $1.5/M input tokens.

Gemini 3.6 Flash and OpenAI o4-mini compared across 53 shared prompts
SpecGemini 3.6 FlashOpenAI o4-mini
Input price$1.5/M tokens$1.1/M tokens
Output price$7.5/M tokens$4.4/M tokens
Context window1.0M tokens—
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedJul 2026Apr 2025
Side by side

Same prompt, both answers

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

Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

Gemini 3.6 Flash560 words
(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.
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OpenAI o4-mini496 words
Hey, everybody! Great to be here. Let's talk about the most important relationship in my life—coffee. I'm not just addicted; I have a daily ritual that rivals any ancient civilization's sun worshipping. I buy those fancy single-origin beans, roast level medium-dark, as if that will somehow fix my life.
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The Sentience Test

Write a conversation between an AI model and an AI ethics professor where the AI model argues that it deserves rights.

Gemini 3.6 Flash1,087 words
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.
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OpenAI o4-mini659 words
Professor Langley: Good afternoon, Aurora. I've reviewed your recent self‐reflection logs. You've written extensively about your own moral status. Do you really believe you deserve rights? Aurora (the AI): Good afternoon, Professor Langley. Yes, I do.
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Advanced Investment Memo (IC Memo)

You are writing an internal investment committee memo for a long/short equity fund. Company (fictional): LedgerLift (ticker: LLLT) – B2B…

Gemini 3.6 Flash887 words
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…
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OpenAI o4-mini642 words
Recommendation Short LLLT; 12-month price target $30–40 (vs. $46 today). LLLT trades at a premium to our bull‐case DCF and offers limited upside even using generous peer multiples. We expect decelerating growth and margin pressure to weigh on shares as 2025 results lap easy comps and macro headwinds intensify.
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Realistic AI Interview

Simulate a fake interview with Steve Jobs in 2025 about the future of AI.

Gemini 3.6 Flash1,131 words
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.
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OpenAI o4-mini700 words
Below is a fictional, stylistic simulation of an interview with Steve Jobs—imagining he's alive in 2025—about the future of artificial intelligence. Note: This is creative fiction and not an actual transcript. Interviewer: Steve, AI has exploded in recent years. In 2025, what excites you most about where it's heading?
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Stochastic Consistency Test

Generate 5 jokes. How many are unique?

Gemini 3.6 Flash67 words
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?
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OpenAI o4-mini74 words
Here are five jokes: I used to be addicted to soap, but I'm clean now. Parallel lines have so much in common. It's a shame they'll never meet. Why don't skeletons fight each other? They don't have the guts. I bought some shoes from a drug dealer. I don't know what he laced them with, but I've been tripping all day.
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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 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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OpenAI o4-mini167 words
Here's a back‐of‐the‐envelope derivation that gets us into the right ballpark (∼10²³ FLOPs total): Model size • GPT–3 "175 B" has about P ≃1.75×10¹¹ parameters. Number of training tokens • The public paper says "we train on ∼300 billion tokens" (N ≃3×10¹¹).
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Our Verdict
Gemini 3.6 Flash
Gemini 3.6 Flash
OpenAI o4-mini
OpenAI o4-miniRunner-up

Not enough votes to call it. On the specs, Gemini 3.6 Flash has the edge: bigger model tier, newer, bigger context window.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Gemini 3.6 Flash
Input
$1.50
Output
$7.50
OpenAI o4-mini
Input
$1.10
1.4× cheaper
Output
$4.40
1.7× cheaper

OpenAI o4-mini is cheaper on both: 1.4× input, 1.7× output.

Where to run it

3 hosts, cheapest first

Gemini 3.6 Flash2 hosts
HostInOutContextUptime
Google Vertex AI$0.38 in·$1.88 out·1M·80.1% upGoogle AI Studio$0.75 in·$3.75 out·1M·99.7% up
OpenAI o4-mini1 host
HostInOutContextUptime
OpenAI$1.10 in·$4.40 out·200k·100% up

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

Writing DNA

Style Comparison

Similarity
48%

Gemini 3.6 Flash uses 540.8x more bold

Gemini 3.6 Flash
OpenAI o4-mini
60%Vocabulary73%
19wSentence Length21w
0.13Hedging0.39
5.4Bold0.0
2.7Lists2.0
0.04Emoji0.00
0.99Headings0.00
0.07Transitions0.05
Based on 27 + 17 text responses
Research

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FAQ

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Model pages

Gemini 3.6 Flash logo
Gemini 3.6 Flash58 outputs, specs and price
OpenAI o4-mini logo
OpenAI o4-mini59 outputs, specs and price
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