What is the difference between Claude 3 Haiku and Grok 4.1 Fast?

Claude 3 Haiku is developed by Anthropic while Grok 4.1 Fast is developed by xAI. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Haiku or Grok 4.1 Fast?

It depends on your use case. Claude 3 Haiku and Grok 4.1 Fast each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How can I compare Claude 3 Haiku and Grok 4.1 Fast on Rival?

This page shows a side-by-side comparison of Claude 3 Haiku and Grok 4.1 Fast 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 Claude 3 Haiku and Grok 4.1 Fast?

Claude 3 Haiku is developed by Anthropic while Grok 4.1 Fast is developed by xAI. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Haiku or Grok 4.1 Fast?

It depends on your use case. Claude 3 Haiku and Grok 4.1 Fast each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How can I compare Claude 3 Haiku and Grok 4.1 Fast on Rival?

This page shows a side-by-side comparison of Claude 3 Haiku and Grok 4.1 Fast 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.

Claude 3 Haiku vs Grok 4.1 Fast: Which Is Better?

Updated Nov 2025

Our Verdict

Grok 4.1 Fast

Claude 3 HaikuRunner-up

No community votes yet. On paper, Grok 4.1 Fast has the edge — bigger model tier, newer.

Too close to call

API pricing

Cost per 1M tokens

Claude 3 Haiku

Input

$0.25

Output

$1.25

Grok 4.1 Fast

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

29%

Grok 4.1 Fast uses 99.5x more headings

Claude 3 Haiku

Grok 4.1 Fast

50%Vocabulary67%

22wSentence Length15w

0.71Hedging0.17

0.3Bold4.7

5.9Lists3.7

0.00Emoji0.00

0.00Headings0.99

0.08Transitions0.14

Based on 13 + 24 text responses

Research

What we learned reading every model

Claude 3 Haiku and Grok 4.1 Fast 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

Claude 3 Haiku vs MiniMax M3New provider

Claude 3 Haiku vs Llama 4 MaverickNew provider

Claude 3 Haiku vs GPT-5New provider

Updated Nov 2025

Our Verdict

Grok 4.1 Fast

Claude 3 HaikuRunner-up

No community votes yet. On paper, Grok 4.1 Fast has the edge — bigger model tier, newer.

Too close to call

API pricing

Cost per 1M tokens

Claude 3 Haiku

Input

$0.25

Output

$1.25

Grok 4.1 Fast

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

29%

Grok 4.1 Fast uses 99.5x more headings

Claude 3 Haiku

Grok 4.1 Fast

50%Vocabulary67%

22wSentence Length15w

0.71Hedging0.17

0.3Bold4.7

5.9Lists3.7

0.00Emoji0.00

0.00Headings0.99

0.08Transitions0.14

Based on 13 + 24 text responses

Research

What we learned reading every model

Claude 3 Haiku and Grok 4.1 Fast 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

Claude 3 Haiku vs MiniMax M3New provider

Claude 3 Haiku vs Llama 4 MaverickNew provider

Claude 3 Haiku vs GPT-5New provider