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  5. Gemini 3 Flash PreviewvsGrok 4.7
Updated Sep 2026

Gemini 3 Flash PreviewvsGrok 4.7

Gemini 3 Flash Preview is cheaper than Grok 4.7 at $0.5/M vs $1.6/M input tokens.

Gemini 3 Flash Preview and Grok 4.7 compared across 10 shared prompts
SpecGemini 3 Flash PreviewGrok 4.7
Input price$0.5/M tokens$1.6/M tokens
Output price$3/M tokens$4.8/M tokens
Context window1.0M tokens500K tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedDec 2025Sep 2026
Side by side

Same prompt, both answers

Opening lines from 5 of the 10 prompts both answered. Formatting stripped, words untouched.

Startup Pitch Teardown

Here's a pitch deck summary for a startup called "MindMeld AI": **Slide 1 - Vision:** "We're building the future of human-AI collaboration.…

Gemini 3 Flash Preview550 words
This pitch for MindMeld AI contains several "red flags" that sophisticated investors would immediately challenge. Here are the three weakest claims, the reasoning behind their weakness, and how to fix them. The Technology Claim: "94% accuracy in decoding neural patterns into text."
Read the full answer
Grok 4.7599 words
Three weakest claims 1. “Predict what you want to type before you think it” (Slide 1) This is scientifically incoherent, not just ambitious. Non-invasive EEG decodes neural activity that is already underway (motor imagery, attempted speech, attention).
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 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.
Read the full answer
Grok 4.7129 words
Pantry Gold Honey Biscuits A sweet, buttery, slightly salty biscuit that tastes like it took more effort than it did. Ingredients (7) 2 cups all-purpose flour 1 tbsp baking powder ½ tsp salt ¼ cup sugar ½ cup butter (cold) ¾ cup milk 2 tbsp honey Time: about 10 minutes prep, 12–15 minutes bake Instructions Heat the…
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 Flash Preview739 words
This architecture contains several critical flaws that would prevent it from functioning as a "Google Docs" clone. The most significant issues involve data integrity, synchronization latency, and security.
Read the full answer
Grok 4.71,399 words
This design will lose edits, split users into inconsistent views, and fall over under concurrent writing. The core problems are clock-based conflict resolution, per-server WebSocket fan-out, polling as the sync path, and treating documents as full HTML snapshots.
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 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.
Read the full answer
Grok 4.7442 words
1-month beginner plan for better health and longevity Focus on three foundations: nutrition, movement, and sleep. Aim for consistency over perfection. If you have a medical condition, check with a clinician before big changes. Week-by-week rhythm Week 1: Build awareness and one easy habit in each area.
Read the full answer

Explain Like I'm a Specific Expert

Explain how a large language model (like GPT or Claude) learns and generates text to each of these three audiences: 1. **An experienced…

Gemini 3 Flash Preview818 words
The Software Engineer Focus: Architecture, Compression, and Emergent Complexity Think of an LLM not as a database, but as a lossy, highly compressed representation of a massive codebase (the internet).
Read the full answer
Grok 4.71,173 words
1. Experienced software engineer An LLM is a stateless function from a token sequence to a probability distribution over the next token. Training is a giant batch job: you stream text, run a forward pass, compare the predicted distribution to the actual next token with cross-entropy, and push gradients through billions…
Read the full answer
Our Verdict
Gemini 3 Flash Preview
Gemini 3 Flash Preview
Grok 4.7
Grok 4.7

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

Too close to call
API pricing

Cost per 1M tokens

Gemini 3 Flash Preview
Input
$0.50
3.2× cheaper
Output
$3.00
1.6× cheaper
Grok 4.7
Input
$1.60
Output
$4.80

Gemini 3 Flash Preview is cheaper on both: 3.2× input, 1.6× output.

Where to run it

3 hosts

Gemini 3 Flash Preview2 hosts
HostInOutContextUptime
Google Vertex AI$0.50 in·$3.00 out·1M·98% upGoogle AI Studio$0.50 in·$3.00 out·1M·99.9% up
Grok 4.71 host
HostInOutContextUptime
xAI$1.60 in·$4.80 out·500k·98.9% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Gemini 3 Flash Preview is developed by Google AI while Grok 4.7 is developed by xAI. Gemini 3 Flash Preview has a 1.0M token context window vs Grok 4.7's 500K. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

It depends on your use case. Gemini 3 Flash Preview and Grok 4.7 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

Gemini 3 Flash Preview costs $0.5/M input tokens and Grok 4.7 costs $1.6/M input tokens. Gemini 3 Flash Preview is $1.10/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 Grok 4.7 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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Same lab, same size, long tail

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Gemini 3 Flash Preview vs Grok 4.5Same size
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Grok 4.7 vs Grok Code Fast 1Same lab

Model pages

Gemini 3 Flash Preview logo
Gemini 3 Flash Preview59 outputs, specs and price
Grok 4.7 logo
Grok 4.710 outputs, specs and price
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