What is the difference between Grok 4.1 Fast and Thinking Machines: Inkling?

Grok 4.1 Fast is developed by xAI while Thinking Machines: Inkling is developed by Thinking Machines. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Grok 4.1 Fast or Thinking Machines: Inkling?

It depends on your use case. Grok 4.1 Fast and Thinking Machines: Inkling 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 Grok 4.1 Fast and Thinking Machines: Inkling on Rival?

This page shows a side-by-side comparison of Grok 4.1 Fast and Thinking Machines: Inkling 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 4.1 Fast and Thinking Machines: Inkling?

Grok 4.1 Fast is developed by xAI while Thinking Machines: Inkling is developed by Thinking Machines. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Grok 4.1 Fast or Thinking Machines: Inkling?

It depends on your use case. Grok 4.1 Fast and Thinking Machines: Inkling 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 Grok 4.1 Fast and Thinking Machines: Inkling on Rival?

This page shows a side-by-side comparison of Grok 4.1 Fast and Thinking Machines: Inkling 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 4.1 Fast vs Thinking Machines: Inkling: Which Is Better?

Updated Jul 2026

Our Verdict

Grok 4.1 Fast

Thinking Machines: Inkling

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

API pricing

Cost per 1M tokens

Grok 4.1 Fast

Input

—

Output

—

Thinking Machines: Inkling

Input

$1.00

Output

$4.05

Writing DNA

Style Comparison

Similarity

64%

Thinking Machines: Inkling uses 3.9x more emoji

Grok 4.1 Fast

Thinking Machines: Inkling

67%Vocabulary57%

15wSentence Length19w

0.17Hedging0.30

4.7Bold5.0

3.7Lists2.7

0.00Emoji0.04

0.99Headings0.49

0.14Transitions0.06

Based on 24 + 27 text responses

Research

What we learned reading every model

Grok 4.1 Fast and Thinking Machines: Inkling 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

Grok 4.1 Fast vs MiniMax M3New provider

Grok 4.1 Fast vs GPT-5New provider

Grok 4.1 Fast vs Llama 4 MaverickNew provider

Updated Jul 2026

Our Verdict

Grok 4.1 Fast

Thinking Machines: Inkling

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

API pricing

Cost per 1M tokens

Grok 4.1 Fast

Input

—

Output

—

Thinking Machines: Inkling

Input

$1.00

Output

$4.05

Writing DNA

Style Comparison

Similarity

64%

Thinking Machines: Inkling uses 3.9x more emoji

Grok 4.1 Fast

Thinking Machines: Inkling

67%Vocabulary57%

15wSentence Length19w

0.17Hedging0.30

4.7Bold5.0

3.7Lists2.7

0.00Emoji0.04

0.99Headings0.49

0.14Transitions0.06

Based on 24 + 27 text responses

Research

What we learned reading every model

Grok 4.1 Fast and Thinking Machines: Inkling 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

Grok 4.1 Fast vs MiniMax M3New provider

Grok 4.1 Fast vs GPT-5New provider

Grok 4.1 Fast vs Llama 4 MaverickNew provider