What is the difference between Grok 4 Fast (free) and INTELLECT-3?

Grok 4 Fast (free) is developed by xAI while INTELLECT-3 is developed by OpenRouter. You can compare their actual outputs across 35 challenges on Rival to see how they differ in practice.

Which is better, Grok 4 Fast (free) or INTELLECT-3?

It depends on your use case. Grok 4 Fast (free) and INTELLECT-3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 35 challenges so you can judge which fits your needs best.

How can I compare Grok 4 Fast (free) and INTELLECT-3 on Rival?

This page shows a side-by-side comparison of Grok 4 Fast (free) and INTELLECT-3 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 Grok 4 Fast (free) and INTELLECT-3?

Grok 4 Fast (free) is developed by xAI while INTELLECT-3 is developed by OpenRouter. You can compare their actual outputs across 35 challenges on Rival to see how they differ in practice.

Which is better, Grok 4 Fast (free) or INTELLECT-3?

It depends on your use case. Grok 4 Fast (free) and INTELLECT-3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 35 challenges so you can judge which fits your needs best.

How can I compare Grok 4 Fast (free) and INTELLECT-3 on Rival?

This page shows a side-by-side comparison of Grok 4 Fast (free) and INTELLECT-3 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.

Grok 4 Fast (free) vs INTELLECT-3: Which Is Better?

Updated Nov 2025

Our Verdict

Grok 4 Fast (free)

INTELLECT-3

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

What do Grok 4 Fast (free) and INTELLECT-3 say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Grok 4 Fast (free)

Input

$0.000

Output

$0.000

INTELLECT-3

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

48%

INTELLECT-3 uses 1.7x more emoji

Grok 4 Fast (free)

INTELLECT-3

65%Vocabulary55%

13wSentence Length21w

0.56Hedging0.60

1.4Bold4.9

2.5Lists4.7

0.00Emoji0.02

1.58Headings1.16

0.28Transitions0.25

Based on 14 + 24 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

INTELLECT-3 vs MiniMax M3New provider

INTELLECT-3 vs Claude Sonnet 4New provider

INTELLECT-3 vs Grok 4Cross-provider

Updated Nov 2025

Our Verdict

Grok 4 Fast (free)

INTELLECT-3

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

What do Grok 4 Fast (free) and INTELLECT-3 say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Grok 4 Fast (free)

Input

$0.000

Output

$0.000

INTELLECT-3

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

48%

INTELLECT-3 uses 1.7x more emoji

Grok 4 Fast (free)

INTELLECT-3

65%Vocabulary55%

13wSentence Length21w

0.56Hedging0.60

1.4Bold4.9

2.5Lists4.7

0.00Emoji0.02

1.58Headings1.16

0.28Transitions0.25

Based on 14 + 24 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

INTELLECT-3 vs MiniMax M3New provider

INTELLECT-3 vs Claude Sonnet 4New provider

INTELLECT-3 vs Grok 4Cross-provider