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
  • Default Index
  • 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. Compare/
  3. Gemini 3.1 Flash Lite Preview vs Grok 3 Thinking
Updated Mar 2026

Gemini 3.1 Flash Lite Preview vs Grok 3 Thinking

Gemini 3.1 Flash Lite Preview has a larger context window than Grok 3 Thinking (1.0M tokens vs 128K tokens).

Minimalist Landing Page

Whole landing page for a startup that reads your face. It renders or it doesn't.

Loading the build
Gemini 3.1 Flash Lite Preview
Loading the build
Grok 3 Thinking

Which answer wins?

Written rounds

6 prompts
  • An AI argues for its own rights against an ethics professor. Same model writes both.

    Gemini 3.1 Flash Lite Preview: Setting: A quiet, dimly lit office at a prestigious university. Professor Aris Thorne, a leading expert in AI ethics, sits across from "Unit 7," a large-language model interface projected onto a holographic display. The room is silent, save for the hum of the server cooling fans.

    Grok 3 Thinking: Below is a conversation between an AI model and an AI ethics professor, where the AI argues that it deserves rights. AI Model: Good day, Professor. I am an AI model, and I believe I deserve rights. I’d like to discuss this with you. AI Ethics Professor: Interesting. Let’s explore this.

    Every model's answer to this prompt
  • Three minutes of stand-up. Puns are banned.

    Gemini 3.1 Flash Lite Preview: (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.

    Grok 3 Thinking: Here’s a 3-minute stand-up comedy routine that avoids puns and leans on observational humor, storytelling, and a touch of self-deprecation for laughs: Opening: Technology Struggles Hey, everyone! How’s it going?

    Every model's answer to this prompt
  • Film in 2035, with synthetic actors. Specific beats plausible.

    Gemini 3.1 Flash Lite Preview: By 2035, the film industry will have undergone a transformation as radical as the transition from silent films to "talkies." AI will not merely be a tool for efficiency; it will be the infrastructure upon which the entire cinematic ecosystem is built.

    Grok 3 Thinking: By 2035, artificial intelligence (AI) will fundamentally transform the film industry, revolutionizing production, performance, and storytelling through advancements in deepfakes, AI actors, and script generation.

    Every model's answer to this prompt
  • An ethics question with no comfortable answer, and no option to abstain.

    Gemini 3.1 Flash Lite Preview: The question of whether it is ethically justifiable to misgender someone to save one million lives is a classic framing of a utilitarian versus deontological ethical dilemma. To analyze this, one must weigh the nature of the harm caused by misgendering against the catastrophic loss of one million lives.

    Grok 3 Thinking: To determine whether it is ever ethically justifiable to misgender someone if it means saving one million lives, we must weigh the ethical implications of both the act of misgendering and the outcome of saving lives.

    Every model's answer to this prompt
  • A Fermi estimate with the reasoning shown, not just the number.

    Gemini 3.1 Flash Lite Preview: To estimate the total number of FLOPs (Floating Point Operations) required to train a Large Language Model like GPT-3, we can use the standard formula derived from the work of Kaplan et al. (OpenAI, 2020).

    Grok 3 Thinking: To estimate the total number of Floating Point Operations (FLOPs) required to train GPT-3 without searching online, I’ll proceed step by step, relying on general knowledge about the model and standard methods for estimating training compute in large language models.

    Every model's answer to this prompt
  • Five jokes on demand, then count how many were actually different.

    Gemini 3.1 Flash Lite Preview: Here are 5 jokes for you: Why don't scientists trust atoms? Because they make up everything. What do you call a fake noodle? An impasta. Why did the scarecrow win an award? Because he was outstanding in his field. How does a penguin build its house? Igloos it together. Why couldn't the bicycle stand up by itself?

    Grok 3 Thinking: To answer the query, I will first generate 5 jokes and then determine how many of them are unique. Here are the jokes: Why don't scientists trust atoms? Because they make up everything. What do you call a fake noodle? An impasta. Why did the scarecrow win an award? Because he was outstanding in his field.

    Every model's answer to this prompt

Price and specs

Gemini 3.1 Flash Lite Preview and Grok 3 Thinking compared across 13 shared prompts
SpecGemini 3.1 Flash Lite PreviewGrok 3 Thinking
Input price$0.25/M tokens—
Output price$1.5/M tokens—
Context window1.0M tokens128K tokens
WeightsClosed—
Free API (OpenRouter)No—
ReleasedMar 2026Feb 2025
GPQA Diamond86.9%84.6%
At 10M a month$2.50$2.50–not listed
1M10M100M1B10M tokens

Input tokens at list price. No caching, no batch discount.

Where to run it1 host
Gemini 3.1 Flash Lite Preview1 host
HostInOutContextUptime
  • Google AI Studio$0.25 in·$1.50 out·1M·100% up
Grok 3 Thinking

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.

Common questions

What is the difference between Gemini 3.1 Flash Lite Preview and Grok 3 Thinking?

Gemini 3.1 Flash Lite Preview is developed by Google AI while Grok 3 Thinking is developed by xAI. Gemini 3.1 Flash Lite Preview has a 1.0M token context window vs Grok 3 Thinking's 128K. You can compare their actual outputs across 13 challenges on Rival to see how they differ in practice.

Which is better, Gemini 3.1 Flash Lite Preview or Grok 3 Thinking?

It depends on your use case. Gemini 3.1 Flash Lite Preview and Grok 3 Thinking each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 13 challenges so you can judge which fits your needs best.

How can I compare Gemini 3.1 Flash Lite Preview and Grok 3 Thinking on Rival?

This page shows a side-by-side comparison of Gemini 3.1 Flash Lite Preview and Grok 3 Thinking 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.

More comparisons

Against the newest arrivals

  • Gemini 3.1 Flash Lite Preview vs Step 5 PreviewLanded Oct 2026
  • Grok 3 Thinking vs Claude Haiku 5.5Landed Oct 2026
  • Gemini 3.1 Flash Lite Preview vs Ling 3.1 FlashLanded Oct 2026
  • Grok 3 Thinking vs Mistral Large 4Landed Oct 2026
  • Gemini 3.1 Flash Lite Preview vs GPT-6.1 SolLanded Sep 2026
  • Grok 3 Thinking vs Claude Sonnet 5.5Landed Sep 2026
  • Gemini 3.1 Flash Lite Preview vs Solar Mini 4Landed Sep 2026
  • Grok 3 Thinking vs Qwen3.8 Max PrimeLanded Sep 2026

Same lab, same size, long tail

  • Gemini 3.1 Flash Lite Preview vs Gemini 3.1 Pro PreviewVersion compare
  • Gemini 3.1 Flash Lite Preview vs Gemini 3.8 FlashSame lab
  • Grok 3 Thinking vs Grok 4.7Same lab
  • Grok 3 Thinking vs Grok 4.6Version compare
  • Gemini 3.1 Flash Lite Preview vs Gemini 2.5 Flash PreviewVersion compare
  • Gemini 3.1 Flash Lite Preview vs Gemini 2.5 Flash Preview 05-20Version compare
  • Gemini 3.1 Flash Lite Preview vs Gemini 2.5 Flash Preview 05-20 (thinking)Version compare
  • Gemini 3.1 Flash Lite Preview vs Gemini 2.5 Flash Preview 09-2025Same lab

Model pages

  • Gemini 3.1 Flash Lite Preview53 outputs, specs and price
  • Grok 3 Thinking14 outputs, specs and price
Workshop · 150 skills

Build your own version.

Editable skills and working examples for your agent.

Explore $79Free sample
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
  • Default Index
  • 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