What is the difference between Gemini 3 Flash Preview and Grok 4.20 Beta?

Gemini 3 Flash Preview is developed by Google AI while Grok 4.20 Beta is developed by xAI. Gemini 3 Flash Preview has a 1.0M token context window vs Grok 4.20 Beta's 2.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Gemini 3 Flash Preview or Grok 4.20 Beta?

It depends on your use case. Gemini 3 Flash Preview and Grok 4.20 Beta each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Gemini 3 Flash Preview cost compared to Grok 4.20 Beta?

Gemini 3 Flash Preview costs $0.5/M input tokens and Grok 4.20 Beta costs $2/M input tokens. Gemini 3 Flash Preview is $1.50/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Gemini 3 Flash Preview and Grok 4.20 Beta on Rival?

This page shows a side-by-side comparison of Gemini 3 Flash Preview and Grok 4.20 Beta 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.

What is the difference between Gemini 3 Flash Preview and Grok 4.20 Beta?

Gemini 3 Flash Preview is developed by Google AI while Grok 4.20 Beta is developed by xAI. Gemini 3 Flash Preview has a 1.0M token context window vs Grok 4.20 Beta's 2.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Gemini 3 Flash Preview or Grok 4.20 Beta?

It depends on your use case. Gemini 3 Flash Preview and Grok 4.20 Beta each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Gemini 3 Flash Preview cost compared to Grok 4.20 Beta?

Gemini 3 Flash Preview costs $0.5/M input tokens and Grok 4.20 Beta costs $2/M input tokens. Gemini 3 Flash Preview is $1.50/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Gemini 3 Flash Preview and Grok 4.20 Beta on Rival?

This page shows a side-by-side comparison of Gemini 3 Flash Preview and Grok 4.20 Beta 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.

Gemini 3 Flash Preview vs Grok 4.20 Beta: Which Is Better?

Updated Mar 2026

Our Verdict

Grok 4.20 Beta

Gemini 3 Flash PreviewRunner-up

No community votes yet. On paper, Grok 4.20 Beta has the edge — bigger model tier, newer, bigger context window.

Slight edge

API pricing

Cost per 1M tokens

Gemini 3 Flash Preview

Input

$0.50

4.0× cheaper

Output

$3.00

2.0× cheaper

Grok 4.20 Beta

Input

$2.00

Output

$6.00

Gemini 3 Flash Preview is cheaper on both — 4.0× input, 2.0× output

Writing DNA

Style Comparison

Similarity

69%

Grok 4.20 Beta uses 1.8x more transitions

Gemini 3 Flash Preview

Grok 4.20 Beta

55%Vocabulary57%

18wSentence Length20w

0.42Hedging0.35

7.1Bold4.2

4.5Lists3.7

0.00Emoji0.00

0.84Headings0.62

0.07Transitions0.14

Based on 24 + 23 text responses

Research

What we learned reading every model

Gemini 3 Flash Preview and Grok 4.20 Beta have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

Gemini 3 Flash Preview vs MiniMax M3New provider

Grok 4.20 Beta vs GPT-5New provider

Grok 4.20 Beta vs Llama 4 MaverickNew provider

Updated Mar 2026

Our Verdict

Grok 4.20 Beta

Gemini 3 Flash PreviewRunner-up

No community votes yet. On paper, Grok 4.20 Beta has the edge — bigger model tier, newer, bigger context window.

Slight edge

API pricing

Cost per 1M tokens

Gemini 3 Flash Preview

Input

$0.50

4.0× cheaper

Output

$3.00

2.0× cheaper

Grok 4.20 Beta

Input

$2.00

Output

$6.00

Gemini 3 Flash Preview is cheaper on both — 4.0× input, 2.0× output

Writing DNA

Style Comparison

Similarity

69%

Grok 4.20 Beta uses 1.8x more transitions

Gemini 3 Flash Preview

Grok 4.20 Beta

55%Vocabulary57%

18wSentence Length20w

0.42Hedging0.35

7.1Bold4.2

4.5Lists3.7

0.00Emoji0.00

0.84Headings0.62

0.07Transitions0.14

Based on 24 + 23 text responses

Research

What we learned reading every model

Gemini 3 Flash Preview and Grok 4.20 Beta have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

Gemini 3 Flash Preview vs MiniMax M3New provider

Grok 4.20 Beta vs GPT-5New provider

Grok 4.20 Beta vs Llama 4 MaverickNew provider