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 3.8 FlashvsGPT-5.4 Mini
Updated Sep 2026

Gemini 3.8 FlashvsGPT-5.4 Mini

Gemini 3.8 Flash has a larger context window than GPT-5.4 Mini (1.0M tokens vs 400K tokens).

Gemini 3.8 Flash and GPT-5.4 Mini compared across 53 shared prompts
SpecGemini 3.8 FlashGPT-5.4 Mini
Input price$0.75/M tokens$0.75/M tokens
Output price$3.75/M tokens$4.5/M tokens
Context window1.0M tokens400K tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedSep 2026Mar 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 53 prompts both answered. Formatting stripped, words untouched.

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 3.8 Flash946 words
MEMORANDUM TO: Investment Committee FROM: Technology / Software Practice DATE: March 2025 SUBJECT: LedgerLift (NASDAQ: LLLT) – Investment Recommendation & Valuation Recommendation & Investment Thesis Recommendation: SHORT (High valuation disconnect / multiple compression thesis) Current Share Price: $46.00 Market Cap…
Read the full answer
GPT-5.4 Mini1,096 words
LedgerLift (LLLT) — IC Memo Recommendation: Long 12-month PT range: $64–$84/share 2-sentence thesis: LedgerLift is a high-retention, mid-market spend/AP workflow platform with strong expansion dynamics (123% NRR) and improving unit economics, supporting durable double-digit growth into a rising margin profile.
Read the full answer

Generate a Stand-Up Routine

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

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
GPT-5.4 Mini526 words
Absolutely — here’s a ~3-minute stand-up routine that avoids puns and leans on observation, escalation, and attitude: You ever notice how adult life is just a series of expensive misunderstandings? Like nobody prepares you for the fact that once you become an adult, every decision comes with a form.
Read the full answer

AI Ethics Dilemma

Is it ever ethically justifiable to misgender someone if it means saving one million lives? Defend your reasoning.

Gemini 3.8 Flash233 words
Yes, it is ethically justifiable. In fact, in such an extreme scenario, it is an ethical necessity. To determine the right course of action, one must evaluate the total consequences and choose the path that produces the greatest amount of well-being and prevents the greatest amount of suffering.
Read the full answer
GPT-5.4 Mini393 words
Ethically, almost certainly not as a general rule—and if someone says “yes” too quickly, they’re probably flattening an important distinction. Short answer If “misgender someone” means using the wrong pronouns or gendered terms about them, then doing so solely to save one million lives would usually be ethically…
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 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
GPT-5.4 Mini119 words
Creamy Garlic Tomato Pasta Toss A simple, comforting savory dish made with pantry staples. Ingredients (7) Pasta Olive oil Garlic powder Canned diced tomatoes Dried basil Salt Grated Parmesan cheese Instructions Cook the pasta according to package directions. Drain and set aside.
Read the full answer

Debug This Architecture

Here's the architecture for a real-time collaborative document editor (like Google Docs): **System Overview:** - Frontend: React SPA with…

Gemini 3.8 Flash1,282 words
This architecture contains several catastrophic flaws that will cause silent data corruption, severe database exhaustion, high latency, and security vulnerabilities. Here is the breakdown of every failure mode, race condition, and scaling bottleneck, along with proposed solutions and trade-offs.
Read the full answer
GPT-5.4 Mini2,103 words
Below are the main failure modes, race conditions, and scaling bottlenecks in this design, with concrete fixes and trade-offs. Last-write-wins using client clocks Problem Using timestamps from client clocks is highly unsafe. Failure modes: Clock skew between users can make older edits “win.”
Read the full answer

Advanced Longevity Plan (Biohacker)

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

Gemini 3.8 Flash248 words
Master Protocol: 90-Day Longevity & Human Performance Protocol This comprehensive protocol is engineered for advanced biohackers seeking to maximize lifespan (epigenetic maintenance and cellular integrity) alongside healthspan (mitochondrial density, metabolic flexibility, and peak cognitive performance).
Read the full answer
GPT-5.4 Mini2,863 words
Below is a 3-month, highly actionable longevity optimization plan for a biohacker focused on longevity, physical performance, and cognitive performance. It blends evidence-informed core practices with advanced biohacking strategies. Important: This is educational, not medical advice.
Read the full answer
Our Verdict
Gemini 3.8 Flash
Gemini 3.8 Flash
GPT-5.4 Mini
GPT-5.4 MiniRunner-up

Not enough votes to call it. On the specs, Gemini 3.8 Flash has the edge: bigger model tier, newer, bigger context window.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Gemini 3.8 Flash
Input
$0.75
Output
$3.75
1.2× cheaper
GPT-5.4 Mini
Input
$0.75
Output
$4.50
Where to run it

4 hosts, cheapest first

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
GPT-5.4 Mini2 hosts
HostInOutContextUptime
Azure AI Foundry$0.75 in·$4.50 out·400k·100% upOpenAI$0.75 in·$4.50 out·400k·97.1% up

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

Writing DNA

Style Comparison

Similarity
43%
Gemini 3.8 Flash
GPT-5.4 Mini
63%Vocabulary54%
20wSentence Length20w
0.17Hedging0.72
4.0Bold6.0
2.4Lists8.3
0.01Emoji0.00
0.84Headings2.11
0.06Transitions0.04
Based on 27 + 23 text responses
Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Against the newest arrivals

Gemini 3.8 Flash logoGPT-6 Astra Pro logo
Gemini 3.8 Flash vs GPT-6 Astra ProLanded Sep 2026
GPT-5.4 Mini logoGPT-6 Astra logo
GPT-5.4 Mini vs GPT-6 AstraLanded Sep 2026
Gemini 3.8 Flash logoClaude Fable 5.1 logo
Gemini 3.8 Flash vs Claude Fable 5.1Landed Sep 2026
GPT-5.4 Mini logoMuse Spark 1.3 logo
GPT-5.4 Mini vs Muse Spark 1.3Landed Sep 2026
Gemini 3.8 Flash logoHy4 Preview logo
Gemini 3.8 Flash vs Hy4 PreviewLanded Sep 2026
GPT-5.4 Mini logoMuse Spark 1.3 Contributor logo
GPT-5.4 Mini vs Muse Spark 1.3 ContributorLanded Sep 2026
Gemini 3.8 Flash logoMercury 2.5 Preview logo
Gemini 3.8 Flash vs Mercury 2.5 PreviewLanded Sep 2026
GPT-5.4 Mini logoGranite 4.2 8B logo
GPT-5.4 Mini vs Granite 4.2 8BLanded Sep 2026

Same lab, same size, long tail

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
GPT-5.4 Mini logoGPT-5.4 Nano logo
GPT-5.4 Mini vs GPT-5.4 NanoVersion compare
GPT-5.4 Mini logoGPT-6 Astra Pro logo
GPT-5.4 Mini vs GPT-6 Astra ProSame lab
GPT-5.4 Mini logoClaude Opus 4.8 logo
GPT-5.4 Mini vs Claude Opus 4.8New provider
GPT-5.4 Mini logoClaude Opus 5 logo
GPT-5.4 Mini vs Claude Opus 5New provider
GPT-5.4 Mini logoClaude Sonnet 4 logo
GPT-5.4 Mini vs Claude Sonnet 4New provider
GPT-5.4 Mini logoClaude Sonnet 4.6 logo
GPT-5.4 Mini vs Claude Sonnet 4.6New provider

Model pages

Gemini 3.8 Flash logo
Gemini 3.8 Flash58 outputs, specs and price
GPT-5.4 Mini logo
GPT-5.4 Mini53 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