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  5. Gemini 3 Flash PreviewvsGPT-6 Sol Pro
Updated Sep 2026

Gemini 3 Flash PreviewvsGPT-6 Sol Pro

Gemini 3 Flash Preview is cheaper than GPT-6 Sol Pro at $0.5/M vs $2/M input tokens.

Gemini 3 Flash Preview and GPT-6 Sol Pro compared across 20 shared prompts
SpecGemini 3 Flash PreviewGPT-6 Sol Pro
Input price$0.5/M tokens$2/M tokens
Output price$3/M tokens$10/M tokens
Context window1.0M tokens1.1M tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedDec 2025Sep 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 20 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…

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.
Read the full answer
GPT-6 Sol Pro1,450 words
I would treat this as a credible, urgent safety signal, not as a finding that can wait six months for a completed regulatory submission. The estimate—liver failure in roughly 1 in 8,000 patients over five years—needs validation, but the outcome is severe and the current warning omits it.
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…

Gemini 3 Flash Preview804 words
This contract is extremely one-sided (unconscionable) and contains several "predatory" clauses that place nearly all risk on the Contractor while giving the Client total control. Below is an analysis of the exploitable clauses, suggested modifications, and the legal reasoning behind each.
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GPT-6 Sol Pro970 words
This is a strongly one-sided draft. Do not sign it as written. The enforceability of particular terms—especially the non-compete, payment provisions, and arbitration clause—depends on the governing jurisdiction, which the agreement does not identify.
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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 Flash Preview738 words
To: Investment Committee From: Equity Research Team Date: October 26, 2023 Subject: Investment Recommendation: LedgerLift (LLLT) 1. Recommendation: LONG 12-Month Price Target Range: $58 – $76 (Base to Bull Case) Thesis: LedgerLift is a high-quality mid-market SaaS compounder with exceptional unit economics (123% NRR)…
Read the full answer
GPT-6 Sol Pro974 words
LedgerLift (LLLT) — Investment Committee Memo Recommendation: Short 12-month price target: $30–$44 Thesis. LedgerLift has attractive subscription economics, but at $46 the stock prices in substantially more durable cash flow than the supplied operating assumptions produce: base-case DCF value is about $28 per share…
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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 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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GPT-6 Sol Pro230 words
A simple 1-month health plan Focus on food, movement, and sleep. Start small enough that you can repeat the habits most days. Week Food Movement Sleep 1: Set a baseline Add a fruit or vegetable to one meal each day. Walk for 10 minutes, 4 days this week. Pick a consistent wake-up time.
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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 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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GPT-6 Sol Pro114 words
Golden Pantry Chickpea Patties Prep: 10 minutes · Cook: 8 minutes · Makes: 6 small patties Ingredients — just 7 1 can (15 oz) chickpeas, drained 3 tbsp all-purpose flour 2 tbsp water 2 tbsp olive oil 1 tsp garlic powder 1 tsp paprika ½ tsp salt Instructions Mash the chickpeas with a fork, leaving a few chunky bits.
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Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

Gemini 3 Flash Preview661 words
This 90-day protocol, titled "The Deceleration Framework," is designed for an advanced biohacker. It focuses on the three pillars of longevity: Autophagy Induction, Metabolic Flexibility, and Mitochondrial Efficiency.
Read the full answer
GPT-6 Sol Pro1,411 words
A 12-week longevity and performance plan Aim: improve the health markers most strongly linked to long-term outcomes—cardiorespiratory fitness, strength, blood pressure, metabolic health, sleep, and sustainable habits—while testing whether more experimental “biohacks” add anything useful.
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Our Verdict
Gemini 3 Flash Preview
Gemini 3 Flash Preview
GPT-6 Sol Pro
GPT-6 Sol Pro

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 3 Flash Preview
Input
$0.50
4.0× cheaper
Output
$3.00
3.3× cheaper
GPT-6 Sol Pro
Input
$2.00
Output
$10.00

Gemini 3 Flash Preview is cheaper on both: 4.0× input, 3.3× output.

Where to run it

4 hosts, cheapest first

Gemini 3 Flash Preview2 hosts
HostInOutContextUptime
Google Vertex AI$0.25 in·$1.50 out·1M·96.6% upGoogle AI Studio$0.50 in·$3.00 out·1M·99.9% up
GPT-6 Sol Pro2 hosts
HostInOutContextUptime
Azure AI Foundry$2.00 in·$10.00 out·1.1M·99.9% upOpenAI$2.00 in·$10.00 out·1.1M·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 25 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Gemini 3 Flash Preview is developed by Google AI while GPT-6 Sol Pro is developed by OpenAI. Gemini 3 Flash Preview has a 1.0M token context window vs GPT-6 Sol Pro's 1.1M. You can compare their actual outputs across 20 challenges on Rival to see how they differ in practice.

It depends on your use case. Gemini 3 Flash Preview and GPT-6 Sol Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 20 challenges so you can judge which fits your needs best.

Gemini 3 Flash Preview costs $0.5/M input tokens and GPT-6 Sol Pro costs $2/M input tokens. Gemini 3 Flash Preview is $1.50/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 3 Flash Preview and GPT-6 Sol Pro 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 3 Flash Preview logo
Gemini 3 Flash Preview59 outputs, specs and price
GPT-6 Sol Pro logo
GPT-6 Sol Pro20 outputs, specs and price
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