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  5. Gemini 2.5 Flash Preview (thinking)vsGPT-6 Sol Pro
Updated Sep 2026

Gemini 2.5 Flash Preview (thinking)vsGPT-6 Sol Pro

Gemini 2.5 Flash Preview (thinking) is cheaper than GPT-6 Sol Pro at $0.175/M vs $2/M input tokens.

Gemini 2.5 Flash Preview (thinking) and GPT-6 Sol Pro compared across 2 shared prompts
SpecGemini 2.5 Flash Preview (thinking)GPT-6 Sol Pro
Input price$0.175/M tokens$2/M tokens
Output price$3.5/M tokens$10/M tokens
Context window1.0M tokens1.1M tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedApr 2025Sep 2026
Side by side

Same prompt, both answers

Opening lines from every prompt both answered. Formatting stripped, words untouched.

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 Flash Preview (thinking)272 words
Okay, here is a simple, delicious savory recipe using only 7 common pantry ingredients. Dish Name: Sunshine Lentil Soup This is a bright, comforting soup that\'s surprisingly flavorful with just a few staples.
Read the full answer
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.
Read the full answer

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 Flash Preview (thinking)867 words
Okay, here is a simple, actionable 1-month plan for a beginner focusing on Diet, Exercise, and Sleep for better health and longevity. Goal: To build foundational, sustainable habits in 3 key health areas over 30 days.
Read the full answer
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.
Read the full answer
Our Verdict
GPT-6 Sol Pro
GPT-6 Sol Pro
Gemini 2.5 Flash Preview (thinking)
Gemini 2.5 Flash Preview (thinking)Runner-up

Not enough votes to call it. On the specs, GPT-6 Sol Pro has the edge: bigger model tier, newer.

Too close to call
API pricing

Cost per 1M tokens

Gemini 2.5 Flash Preview (thinking)
Input
$0.17
11× cheaper
Output
$3.50
2.9× cheaper
GPT-6 Sol Pro
Input
$2.00
Output
$10.00

Gemini 2.5 Flash Preview (thinking) is cheaper on both: 11× input, 2.9× output.

Where to run it

2 hosts

Gemini 2.5 Flash Preview (thinking)

No hosts listed on OpenRouter.

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 2.5 Flash Preview (thinking) is developed by Google AI while GPT-6 Sol Pro is developed by OpenAI. Gemini 2.5 Flash Preview (thinking) has a 1.0M token context window vs GPT-6 Sol Pro's 1.1M. You can compare their actual outputs across 2 challenges on Rival to see how they differ in practice.

It depends on your use case. Gemini 2.5 Flash Preview (thinking) and GPT-6 Sol Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 2 challenges so you can judge which fits your needs best.

Gemini 2.5 Flash Preview (thinking) costs $0.175/M input tokens and GPT-6 Sol Pro costs $2/M input tokens. Gemini 2.5 Flash Preview (thinking) is $1.82/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 Flash Preview (thinking) 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.

Keep exploring

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Same lab, same size, long tail

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Gemini 2.5 Flash Preview (thinking) vs Gemini 3.7 FlashVersion compare
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Gemini 2.5 Flash Preview (thinking) logoGLM 5.3 Flash logo
Gemini 2.5 Flash Preview (thinking) vs GLM 5.3 FlashNew provider
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Gemini 2.5 Flash Preview (thinking) vs GLM 5.3 FlashXNew provider
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GPT-6 Sol Pro vs Golden Gate ClaudeSame size
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GPT-6 Sol Pro vs GPT-3.5 TurboSame lab

Model pages

Gemini 2.5 Flash Preview (thinking) logo
Gemini 2.5 Flash Preview (thinking)20 outputs, specs and price
GPT-6 Sol Pro logo
GPT-6 Sol Pro20 outputs, specs and price
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