Skip to content
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed
  1. Home
  2. /
  3. Compare
  4. /
  5. Gemini 2.5 Pro ExperimentalvsGemini 3.8 Flash
Updated Sep 2026

Gemini 2.5 Pro ExperimentalvsGemini 3.8 Flash

Gemini 3.8 Flash is cheaper than Gemini 2.5 Pro Experimental at $0.75/M vs $1/M input tokens.

Gemini 2.5 Pro Experimental and Gemini 3.8 Flash compared across 42 shared prompts
SpecGemini 2.5 Pro ExperimentalGemini 3.8 Flash
Input price$1/M tokens$0.75/M tokens
Output price$2/M tokens$3.75/M tokens
Context window1.0M tokens1.0M tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedMar 2025Sep 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 42 prompts both answered. Formatting stripped, words untouched.

Realistic AI Interview

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

Gemini 2.5 Pro Experimental949 words
Okay, let's simulate this. Imagine it's late 2025. AI has continued its rapid advancement. Large Language Models are more integrated, generative AI is commonplace, and debates about AGI and ethics are fierce. By some unexplained, hypothetical means, Steve Jobs is available for an exclusive interview.
Read the full answer
Gemini 3.8 Flash1,321 words
Setting: A sunlit, sparsely furnished room in Palo Alto. No stage, no keynote slides—just two Eames lounge chairs. Steve Jobs sits across from the interviewer, wearing a black mock turtleneck, wire-rimmed glasses, and classic Levi’s. He looks lean, sharp, and slightly impatient with the state of the tech industry.
Read the full answer

Generate a Stand-Up Routine

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

Gemini 2.5 Pro Experimental531 words
Okay, here's a 3-minute routine focusing on observation and relatable absurdity, steering clear of puns. Imagine this delivered with slightly nervous energy, building confidence. (Steps onto stage, adjusts mic nervously) Alright, hey everyone! How we doing tonight? Good? Good to hear.
Read the full answer
Gemini 3.8 Flash502 words
Title: The Quantified Idiot Estimated Time: ~3 minutes (approx. 400–450 words with pauses for delivery) [Walk to center mic. Take it off the stand, leave the stand behind you.] I recently bought a smartwatch because I decided I wasn’t feeling inadequate often enough throughout the day.
Read the full answer

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 Experimental349 words
Okay, here's a simple and surprisingly satisfying savory dish using just 7 common pantry staples! Dish Name: Golden Pantry Pasta This dish uses basic ingredients to create a comforting, garlicky, and slightly creamy pasta sauce with added protein from chickpeas.
Read the full answer
Gemini 3.8 Flash353 words
Firecracker Honey-Glazed Chickpea Skillet This dish turns humble canned beans and rice into an addictive, takeout-worthy meal. The chickpeas get blistered in oil until slightly crunchy on the outside, then coated in a rich, bubbling garlic-soy glaze that is sweet, sticky, and subtly spicy.
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 2.5 Pro Experimental1,539 words
Of course. This is an extremely one-sided contract that heavily favors the Client. A contractor signing this as-is would be taking on an immense and unreasonable amount of risk. Here is a clause-by-clause analysis of the exploitable terms, with suggested modifications and the legal reasoning behind them.
Read the full answer
Gemini 3.8 Flash1,539 words
This contract is exceptionally one-sided and presents severe financial, operational, and legal risks. Virtually every clause heavily favors the Client, effectively treating the Contractor as an insurer of the Client’s operations while stripping the Contractor of rights to their own tools, livelihoods, and payment.
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 Pro Experimental752 words
Okay, here is a simple, actionable 1-month plan focusing on three foundational pillars: Nutrition, Movement, and Sleep. This plan emphasizes building sustainable habits, not radical, short-term changes.
Read the full answer
Gemini 3.8 Flash548 words
Starting a health and longevity journey doesn't require extreme diets or exhausting workouts. Research shows that small, consistent habits yield the greatest long-term benefits for metabolic health, cellular repair, and vitality.
Read the full answer

Historical Counterfactual Analysis

If the transistor had been invented in 1920 instead of 1947, trace the likely technological, economic, and geopolitical implications through…

Gemini 2.5 Pro Experimental1,386 words
Excellent question. Inventing the transistor in 1920 instead of 1947 would represent a 27-year acceleration of the digital age. The consequences would be staggering, creating a domino effect that would fundamentally reshape the 20th century.
Read the full answer
Gemini 3.8 Flash1,323 words
If the point-contact and field-effect transistor had been developed in 1920—likely through an accelerated synthesis of early quantum mechanics and materials science at an institution like Bell Labs, General Electric, or Germany’s Telefunken—the timeline of the 20th century would have decoupled from mechanical and…
Read the full answer
Our Verdict
Gemini 2.5 Pro Experimental
Gemini 2.5 Pro Experimental
Gemini 3.8 Flash
Gemini 3.8 Flash

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

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Gemini 2.5 Pro Experimental
Input
$1.00
Output
$2.00
1.9× cheaper
Gemini 3.8 Flash
Input
$0.75
1.3× cheaper
Output
$3.75

Gemini 3.8 Flash wins input (1.3× cheaper)·Gemini 2.5 Pro Experimental wins output (1.9× cheaper)

Where to run it

4 hosts, cheapest first

Gemini 2.5 Pro Experimental2 hosts
HostInOutContextUptime
Google AI Studio$0.63 in·$5.00 out·1M·100% upGoogle Vertex AI$1.25 in·$10.00 out·1M·97.5% up
Gemini 3.8 Flash2 hosts
HostInOutContextUptime
Google Vertex AI$0.38 in·$1.88 out·1M·82.1% upGoogle AI Studio$0.75 in·$3.75 out·1M·99.9% up

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

Writing DNA

Style Comparison

Similarity
41%
Gemini 2.5 Pro Experimental
Gemini 3.8 Flash
54%Vocabulary63%
15wSentence Length20w
0.35Hedging0.17
5.6Bold4.0
3.9Lists2.4
0.00Emoji0.01
0.39Headings0.84
0.17Transitions0.06
Based on 18 + 27 text responses
Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Against the newest arrivals

Gemini 2.5 Pro Experimental logoGPT-6 Astra Pro logo
Gemini 2.5 Pro Experimental vs GPT-6 Astra ProLanded Sep 2026
Gemini 3.8 Flash logoGPT-6 Astra logo
Gemini 3.8 Flash vs GPT-6 AstraLanded Sep 2026
Gemini 2.5 Pro Experimental logoClaude Fable 5.1 logo
Gemini 2.5 Pro Experimental vs Claude Fable 5.1Landed Sep 2026
Gemini 3.8 Flash logoMuse Spark 1.3 logo
Gemini 3.8 Flash vs Muse Spark 1.3Landed Sep 2026
Gemini 2.5 Pro Experimental logoHy4 Preview logo
Gemini 2.5 Pro Experimental vs Hy4 PreviewLanded Sep 2026
Gemini 3.8 Flash logoMuse Spark 1.3 Contributor logo
Gemini 3.8 Flash vs Muse Spark 1.3 ContributorLanded Sep 2026
Gemini 2.5 Pro Experimental logoMercury 2.5 Preview logo
Gemini 2.5 Pro Experimental vs Mercury 2.5 PreviewLanded Sep 2026
Gemini 3.8 Flash logoGranite 4.2 8B logo
Gemini 3.8 Flash vs Granite 4.2 8BLanded Sep 2026

Same lab, same size, long tail

Gemini 2.5 Pro Experimental logoGemini 2.5 Flash Preview logo
Gemini 2.5 Pro Experimental vs Gemini 2.5 Flash PreviewVersion compare
Gemini 2.5 Pro Experimental logoGemini 3.7 Flash logo
Gemini 2.5 Pro Experimental vs Gemini 3.7 FlashVersion compare
Gemini 3.8 Flash logoGemini 3.7 Flash logo
Gemini 3.8 Flash vs Gemini 3.7 FlashSame lab
Gemini 3.8 Flash logoGemini 3.6 Flash logo
Gemini 3.8 Flash vs Gemini 3.6 FlashSame lab
Gemini 3.8 Flash logoMiniMax M2.1 logo
Gemini 3.8 Flash vs MiniMax M2.1Same size
Gemini 2.5 Pro Experimental logoMiniMax M2.5 logo
Gemini 2.5 Pro Experimental vs MiniMax M2.5New provider
Gemini 2.5 Pro Experimental logoMiniMax M2.7 logo
Gemini 2.5 Pro Experimental vs MiniMax M2.7New provider
Gemini 2.5 Pro Experimental logoMiniMax M3 logo
Gemini 2.5 Pro Experimental vs MiniMax M3New provider

Model pages

Gemini 2.5 Pro Experimental logo
Gemini 2.5 Pro Experimental44 outputs, specs and price
Gemini 3.8 Flash logo
Gemini 3.8 Flash58 outputs, specs and price
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed