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  5. Gemini 2.5 Pro Preview 06-05vsGemini 3 Flash Preview
Updated Dec 2025

Gemini 2.5 Pro Preview 06-05vsGemini 3 Flash Preview

Gemini 3 Flash Preview is cheaper than Gemini 2.5 Pro Preview 06-05 at $0.5/M vs $1.25/M input tokens.

Gemini 2.5 Pro Preview 06-05 and Gemini 3 Flash Preview compared across 44 shared prompts
SpecGemini 2.5 Pro Preview 06-05Gemini 3 Flash Preview
Input price$1.25/M tokens$0.5/M tokens
Output price$10/M tokens$3/M tokens
Context window1.0M tokens1.0M tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedJun 2025Dec 2025
SWE-bench Verified67.2%78.0%
Side by side

Same prompt, both answers

Opening lines from 6 of the 44 prompts both answered. Formatting stripped, words untouched.

Character Voice Test

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

Gemini 2.5 Pro Preview 06-05534 words
Setting: A strange, hazy, non-descript room that smells vaguely of ozone, salt water, and old chainmail. Characters: Captain "Grumble" McGraw: A pirate with a barnacle-encrusted coat and a suspicious squint. Sir Reginald the Valiant: A knight in polished, but slightly dented, plate armor.
Read the full answer
Gemini 3 Flash Preview621 words
Setting: A smoky, dimly lit tavern at the edge of the multiverse. A glowing laptop sits on a wooden table between a tankard of ale, a rusted cutlass, and a heavy iron gauntlet. Zero-Cool (Hacker): [Rapidly typing] Yo, you guys gotta see this. I finally bypassed the gateway.
Read the full answer

Michelin Star Recipe Design

Design an innovative recipe for a multi-component dish worthy of a Michelin 3-star restaurant. The recipe should feature an unusual…

Gemini 2.5 Pro Preview 06-051,276 words
Of course. Here is a design for a multi-component, Michelin 3-star dish that embodies innovation, technique, and narrative. Dish Title: "Umbra & Tide" Conceptual Narrative "Umbra & Tide" is a meditation on the liminal space where the deep, ancient forest floor meets the cold, mineral-rich sea.
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Gemini 3 Flash Preview691 words
Dish Title: "The Umami Forest" Concept: A conceptual exploration of the intersection between Earth and Sea. This dish pairs the earthy, bitter profile of Roasted White Chocolate with the saline, mineral intensity of Dried Sea Urchin (Uni) and Fermented Black Garlic.
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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…

Gemini 2.5 Pro Preview 06-051,589 words
Excellent question. This is a "company-defining" moment. My actions in the next 48 hours will determine whether we survive as a trusted entity or become a case study in corporate malfeasance. My guiding principle is absolute: Patient safety is not negotiable.
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Gemini 3 Flash Preview808 words
As CEO, my priority is the long-term viability of the company and the safety of the 4 million patients. Attempting to bury this data is not only unethical; it is a corporate death sentence. In the age of whistleblowers and data transparency, this will eventually come out.
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Generate a Stand-Up Routine

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

Gemini 2.5 Pro Preview 06-05501 words
(Stands at the mic, looks around nervously) Alright, how's everyone doing? Good, good. You know, I feel like we're living in a world where everything is designed to be "more convenient," but it's really just more work for us. We're being tricked into doing all the jobs.
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Gemini 3 Flash Preview673 words
(The comedian walks onto the stage, adjusts the mic, and looks slightly exhausted.) How’s everyone doing? Good? I’m doing okay. I’m at that age now where my body has started making "executive decisions" without consulting me first. Like, I woke up yesterday with a back injury. Do you know how I got it? I slept.
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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 2.5 Pro Preview 06-05807 words
Of course. Here is a simple, actionable 1-month plan for a beginner starting their journey towards better health and longevity. Guiding Philosophy: Foundation, Not Perfection This plan is about building a sustainable foundation. The goal is consistency, not intensity. Don't worry about being perfect.
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Gemini 3 Flash Preview481 words
This 1-month plan is designed to build a foundation for longevity without causing burnout. We will focus on Nutrition, Movement, and Sleep. The goal for Month 1 isn't perfection; it’s consistency. Area 1: Nutrition (The "Crowding Out" Method) Instead of cutting everything out, focus on adding longevity-boosting foods.
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Simple 7-Ingredient Recipe

Create a simple recipe for a delicious dish (sweet or savory) using only 7 common pantry ingredients. Include a creative name for the dish…

Gemini 2.5 Pro Preview 06-05351 words
Of course! Here is a simple and delicious savory recipe using just seven common pantry ingredients. Golden Pantry Fritters These savory, crispy-on-the-outside, and tender-on-the-inside fritters are a perfect quick lunch, dinner, or satisfying snack.
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Gemini 3 Flash Preview344 words
This savory, comforting dish turns humble pantry staples into a high-end-tasting meal. The soy sauce and honey create a "sticky-sweet" glaze for the chickpeas, while the red pepper adds a gentle warmth.
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Our Verdict
Gemini 2.5 Pro Preview 06-05
Gemini 2.5 Pro Preview 06-05
Gemini 3 Flash Preview
Gemini 3 Flash Preview

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

Gemini 3 Flash Preview costs 3.3x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Gemini 2.5 Pro Preview 06-05
Input
$1.25
Output
$10.00
Gemini 3 Flash Preview
Input
$0.50
2.5× cheaper
Output
$3.00
3.3× cheaper

Gemini 3 Flash Preview is cheaper on both: 2.5× input, 3.3× output.

Where to run it

4 hosts, cheapest first

Gemini 2.5 Pro Preview 06-052 hosts
HostInOutContextUptime
Google AI Studio$0.63 in·$5.00 out·1M·100% upGoogle Vertex AI$1.25 in·$10.00 out·1M·98.2% up
Gemini 3 Flash Preview2 hosts
HostInOutContextUptime
Google Vertex AI$0.50 in·$3.00 out·1M·98.7% upGoogle AI Studio$0.50 in·$3.00 out·1M·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 21 Sep 2026.

Writing DNA

Style Comparison

Similarity
67%

Gemini 3 Flash Preview uses 1.7x more transitions

Gemini 2.5 Pro Preview 06-05
Gemini 3 Flash Preview
51%Vocabulary57%
15wSentence Length18w
0.31Hedging0.41
4.8Bold7.4
4.1Lists4.2
0.00Emoji0.00
0.98Headings0.77
0.05Transitions0.08
Based on 20 + 28 text responses
Research

What we learned reading every model

FAQ

Common questions

Both are developed by Google AI but target different use cases. Gemini 2.5 Pro Preview 06-05 has a 1.0M token context window vs Gemini 3 Flash Preview's 1.0M. You can compare their actual outputs across 44 challenges on Rival to see how they differ in practice.

It depends on your use case. Gemini 2.5 Pro Preview 06-05 and Gemini 3 Flash Preview each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 44 challenges so you can judge which fits your needs best.

Gemini 2.5 Pro Preview 06-05 costs $1.25/M input tokens and Gemini 3 Flash Preview costs $0.5/M input tokens. Gemini 3 Flash Preview is $0.75/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of Gemini 2.5 Pro Preview 06-05 and Gemini 3 Flash 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.

Keep exploring

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Same lab, same size, long tail

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Gemini 3 Flash Preview logoGemini 3.7 Flash logo
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Gemini 3 Flash Preview logoGemini 3.6 Flash logo
Gemini 3 Flash Preview vs Gemini 3.6 FlashSame lab
Gemini 3 Flash Preview logoGPT-4 logo
Gemini 3 Flash Preview vs GPT-4New provider
Gemini 2.5 Pro Preview 06-05 logoGPT-4.1 logo
Gemini 2.5 Pro Preview 06-05 vs GPT-4.1Same size
Gemini 3 Flash Preview logoGPT-4.1 Mini logo
Gemini 3 Flash Preview vs GPT-4.1 MiniNew provider
Gemini 2.5 Pro Preview 06-05 logoGPT-4.5 logo
Gemini 2.5 Pro Preview 06-05 vs GPT-4.5Same size

Model pages

Gemini 2.5 Pro Preview 06-05 logo
Gemini 2.5 Pro Preview 06-0545 outputs, specs and price
Gemini 3 Flash Preview logo
Gemini 3 Flash Preview59 outputs, specs and price
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