What is the difference between Grok 4.5 and Muse Spark 1.1?

Grok 4.5 is developed by xAI while Muse Spark 1.1 is developed by Meta AI. Grok 4.5 has a 500K token context window vs Muse Spark 1.1's 1.0M. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Grok 4.5 or Muse Spark 1.1?

It depends on your use case. Grok 4.5 and Muse Spark 1.1 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 much does Grok 4.5 cost compared to Muse Spark 1.1?

Grok 4.5 costs $2/M input tokens and Muse Spark 1.1 costs $1.25/M input tokens. Muse Spark 1.1 is $0.75/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 Grok 4.5 and Muse Spark 1.1 on Rival?

This page shows a side-by-side comparison of Grok 4.5 and Muse Spark 1.1 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 4.5 and Muse Spark 1.1?

Grok 4.5 is developed by xAI while Muse Spark 1.1 is developed by Meta AI. Grok 4.5 has a 500K token context window vs Muse Spark 1.1's 1.0M. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Grok 4.5 or Muse Spark 1.1?

It depends on your use case. Grok 4.5 and Muse Spark 1.1 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 much does Grok 4.5 cost compared to Muse Spark 1.1?

Grok 4.5 costs $2/M input tokens and Muse Spark 1.1 costs $1.25/M input tokens. Muse Spark 1.1 is $0.75/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 Grok 4.5 and Muse Spark 1.1 on Rival?

This page shows a side-by-side comparison of Grok 4.5 and Muse Spark 1.1 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 4.5 vs Muse Spark 1.1: Which Is Better?

Updated Jul 2026

Our Verdict

Grok 4.5

Muse Spark 1.1

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 4.5 and Muse Spark 1.1 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 4.5

Input

$2.00

Output

$6.00

Muse Spark 1.1

Input

$1.25

1.6× cheaper

Output

$4.25

1.4× cheaper

Muse Spark 1.1 is cheaper on both — 1.6× input, 1.4× output

Writing DNA

Style Comparison

Similarity

48%

Grok 4.5 uses 9.0x more emoji

Grok 4.5

Muse Spark 1.1

61%Vocabulary61%

16wSentence Length20w

0.23Hedging0.10

2.5Bold3.7

2.4Lists2.0

0.09Emoji0.01

0.48Headings0.52

0.06Transitions0.02

Based on 27 + 29 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Grok 4.5 vs MiniMax M3New provider

Grok 4.5 vs GPT-5New provider

Grok 4.5 vs Gemini 3.6 FlashNew provider

Updated Jul 2026

Our Verdict

Grok 4.5

Muse Spark 1.1

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 4.5 and Muse Spark 1.1 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 4.5

Input

$2.00

Output

$6.00

Muse Spark 1.1

Input

$1.25

1.6× cheaper

Output

$4.25

1.4× cheaper

Muse Spark 1.1 is cheaper on both — 1.6× input, 1.4× output

Writing DNA

Style Comparison

Similarity

48%

Grok 4.5 uses 9.0x more emoji

Grok 4.5

Muse Spark 1.1

61%Vocabulary61%

16wSentence Length20w

0.23Hedging0.10

2.5Bold3.7

2.4Lists2.0

0.09Emoji0.01

0.48Headings0.52

0.06Transitions0.02

Based on 27 + 29 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Grok 4.5 vs MiniMax M3New provider

Grok 4.5 vs GPT-5New provider

Grok 4.5 vs Gemini 3.6 FlashNew provider