What is the difference between GPT-3.5 Turbo and Grok 4.1 Fast?

GPT-3.5 Turbo is developed by OpenAI 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, GPT-3.5 Turbo or Grok 4.1 Fast?

It depends on your use case. GPT-3.5 Turbo 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 GPT-3.5 Turbo and Grok 4.1 Fast on Rival?

This page shows a side-by-side comparison of GPT-3.5 Turbo 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 GPT-3.5 Turbo and Grok 4.1 Fast?

GPT-3.5 Turbo is developed by OpenAI 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, GPT-3.5 Turbo or Grok 4.1 Fast?

It depends on your use case. GPT-3.5 Turbo 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 GPT-3.5 Turbo and Grok 4.1 Fast on Rival?

This page shows a side-by-side comparison of GPT-3.5 Turbo 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.

GPT-3.5 Turbo vs Grok 4.1 Fast: Which Is Better?

Updated Nov 2025

Our Verdict

Grok 4.1 Fast

GPT-3.5 TurboRunner-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

GPT-3.5 Turbo

Input

$1.50

Output

$2.00

Grok 4.1 Fast

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

41%

Grok 4.1 Fast uses 466.5x more bold

GPT-3.5 Turbo

Grok 4.1 Fast

61%Vocabulary67%

16wSentence Length15w

0.23Hedging0.17

0.0Bold4.7

3.7Lists3.7

0.00Emoji0.00

0.00Headings0.99

0.38Transitions0.14

Based on 11 + 24 text responses

Research

What we learned reading every model

GPT-3.5 Turbo 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

GPT-3.5 Turbo vs MiniMax M3New provider

GPT-3.5 Turbo vs Llama 4 MaverickNew provider

GPT-3.5 Turbo vs Gemini 2.5 Pro (I/O Edition)New provider

Updated Nov 2025

Our Verdict

Grok 4.1 Fast

GPT-3.5 TurboRunner-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

GPT-3.5 Turbo

Input

$1.50

Output

$2.00

Grok 4.1 Fast

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

41%

Grok 4.1 Fast uses 466.5x more bold

GPT-3.5 Turbo

Grok 4.1 Fast

61%Vocabulary67%

16wSentence Length15w

0.23Hedging0.17

0.0Bold4.7

3.7Lists3.7

0.00Emoji0.00

0.00Headings0.99

0.38Transitions0.14

Based on 11 + 24 text responses

Research

What we learned reading every model

GPT-3.5 Turbo 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

GPT-3.5 Turbo vs MiniMax M3New provider

GPT-3.5 Turbo vs Llama 4 MaverickNew provider

GPT-3.5 Turbo vs Gemini 2.5 Pro (I/O Edition)New provider