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  5. Gemini 2.5 Pro Preview 06-05vsGemini 3.1 Flash Lite Preview
Updated Mar 2026

Gemini 2.5 Pro Preview 06-05vsGemini 3.1 Flash Lite Preview

Gemini 3.1 Flash Lite Preview is cheaper than Gemini 2.5 Pro Preview 06-05 at $0.25/M vs $1.25/M input tokens.

Gemini 2.5 Pro Preview 06-05 and Gemini 3.1 Flash Lite Preview compared across 44 shared prompts
SpecGemini 2.5 Pro Preview 06-05Gemini 3.1 Flash Lite Preview
Input price$1.25/M tokens$0.25/M tokens
Output price$10/M tokens$1.5/M tokens
Context window1.0M tokens1.0M tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedJun 2025Mar 2026
Side by side

Same prompt, both answers

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

Mini LBO Underwrite

You are underwriting a 5-year LBO for a private equity investment committee. Company (fictional): HarborTech Services (HTS) –…

Gemini 2.5 Pro Preview 06-0553 words
Of course. Here is the requested LBO underwriting summary for HarborTech Services. 1. Simplified LBO Model (FY2026–FY2030) First, let's establish the entry calculations based on FY2025 figures: FY2025 EBITDA: $120m Entry Enterprise Value (EV): $120m * 12.0x = $1,440m Transaction Fees: $1,440m * 2.0% = $28.8m Total…
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Gemini 3.1 Flash Lite Preview365 words
Financial Projections (FY2026–FY2030) Initial Setup (End of FY2025): EV: $120m * 12.0x = $1,440m Fees: $1,440m * 2.0% = $28.8m Term Loan (4.0x): $480m Mezzanine (1.5x): $180m Equity: $1,440m + $28.8m - $480m - $180m = $808.8m Metric ($m) FY2026 FY2027 FY2028 FY2029 FY2030 Revenue 972.0 1,040.0 1,102.4 1,157.5 1,215.4…
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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 3.1 Flash Lite Preview671 words
This situation represents a "bet-the-company" crisis. From a leadership perspective, the primary objective is to protect the company’s long-term viability by preserving its integrity, while mitigating the immediate financial shock. Attempting to bury this data—or "waiting for more data"—is a catastrophic error.
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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 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.
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Gemini 3.1 Flash Lite Preview475 words
The three sat around a flickering tavern table in a pocket dimension that smelled simultaneously of salt spray, cold iron, and ozone. Captain Barnaby (Pirate): "I tell ye, it’s sorcery! This 'Artificial Intelligence' be like a parrot that’s swallowed every map in the seven seas.
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Adversarial Contract Review

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

Gemini 2.5 Pro Preview 06-051,658 words
Of course. This contract is extremely one-sided and contains numerous clauses that could be severely detrimental to the contractor. A contractor should not sign this agreement as written. Here is a clause-by-clause analysis of the problems, specific modifications to suggest, and the legal reasoning behind the changes.
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Gemini 3.1 Flash Lite Preview712 words
This contract is heavily weighted in favor of the Client and contains several "red flag" clauses that create extreme financial and professional risk for the Contractor. Scope (Clause 1) The Problem: "Client reserves the right to modify the scope at any time without additional compensation."
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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 3.1 Flash Lite Preview518 words
(Walks onto the stage, adjusts the mic stand, looks around slowly.) Hi. How’s everybody doing? Good? Good. I’m doing okay. I’ve reached that age where my body has started making sound effects. Like, I’ll just stand up from the couch and my knees go “CRACK.” It’s not even a movement; it’s a closing argument.
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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 3.1 Flash Lite Preview568 words
The Dish: "Nebula of the Forest Floor" Conceptual Narrative: This dish explores the intersection of decay and rebirth. The pairing—Black Garlic and Wild Foraged Pine Needles—creates an umami-forward, resinous profile that mimics the damp, dark scent of an ancient coniferous forest.
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Our Verdict
Gemini 2.5 Pro Preview 06-05
Gemini 2.5 Pro Preview 06-05
Gemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview

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

Gemini 3.1 Flash Lite Preview costs 6.7x 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 3.1 Flash Lite Preview
Input
$0.25
5.0× cheaper
Output
$1.50
6.7× cheaper

Gemini 3.1 Flash Lite Preview is cheaper on both: 5.0× input, 6.7× output.

Where to run it

3 hosts

Gemini 2.5 Pro Preview 06-052 hosts
HostInOutContextUptime
Google Vertex AI$1.25 in·$10.00 out·1M·95.4% upGoogle AI Studio$1.25 in·$10.00 out·1M·99.1% up
Gemini 3.1 Flash Lite Preview1 host
HostInOutContextUptime
Google AI Studio$0.25 in·$1.50 out·1M·99.7% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Writing DNA

Style Comparison

Similarity
69%
Gemini 2.5 Pro Preview 06-05
Gemini 3.1 Flash Lite Preview
51%Vocabulary56%
15wSentence Length18w
0.31Hedging0.28
4.8Bold5.4
4.1Lists3.9
0.00Emoji0.00
0.98Headings0.95
0.05Transitions0.07
Based on 20 + 23 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 3.1 Flash Lite 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 3.1 Flash Lite 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 3.1 Flash Lite Preview costs $0.25/M input tokens. Gemini 3.1 Flash Lite Preview is $1.00/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 3.1 Flash Lite 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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Model pages

Gemini 2.5 Pro Preview 06-05 logo
Gemini 2.5 Pro Preview 06-0545 outputs, specs and price
Gemini 3.1 Flash Lite Preview logo
Gemini 3.1 Flash Lite Preview53 outputs, specs and price
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