What is the difference between Z.ai: GLM 5.1 and Meta: Muse Spark 1.1?

Z.ai: GLM 5.1 is developed by Z-ai while Meta: Muse Spark 1.1 is developed by Meta AI. Z.ai: GLM 5.1 has a 203K token context window vs Meta: Muse Spark 1.1's 1.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Z.ai: GLM 5.1 or Meta: Muse Spark 1.1?

It depends on your use case. Z.ai: GLM 5.1 and Meta: Muse Spark 1.1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Z.ai: GLM 5.1 cost compared to Meta: Muse Spark 1.1?

Z.ai: GLM 5.1 costs $1.4/M input tokens and Meta: Muse Spark 1.1 costs $1.25/M input tokens. Meta: Muse Spark 1.1 is $0.15/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 Z.ai: GLM 5.1 and Meta: Muse Spark 1.1 on Rival?

This page shows a side-by-side comparison of Z.ai: GLM 5.1 and Meta: 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 Z.ai: GLM 5.1 and Meta: Muse Spark 1.1?

Z.ai: GLM 5.1 is developed by Z-ai while Meta: Muse Spark 1.1 is developed by Meta AI. Z.ai: GLM 5.1 has a 203K token context window vs Meta: Muse Spark 1.1's 1.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Z.ai: GLM 5.1 or Meta: Muse Spark 1.1?

It depends on your use case. Z.ai: GLM 5.1 and Meta: Muse Spark 1.1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Z.ai: GLM 5.1 cost compared to Meta: Muse Spark 1.1?

Z.ai: GLM 5.1 costs $1.4/M input tokens and Meta: Muse Spark 1.1 costs $1.25/M input tokens. Meta: Muse Spark 1.1 is $0.15/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 Z.ai: GLM 5.1 and Meta: Muse Spark 1.1 on Rival?

This page shows a side-by-side comparison of Z.ai: GLM 5.1 and Meta: 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.

Z.ai: GLM 5.1 vs Meta: Muse Spark 1.1: Which Is Better?

Updated Jul 2026

Our Verdict

Meta: Muse Spark 1.1

Z.ai: GLM 5.1Runner-up

No community votes yet. On paper, Meta: Muse Spark 1.1 has the edge — newer, bigger context window, major provider backing.

Too close to call

API pricing

Cost per 1M tokens

Z.ai: GLM 5.1

Input

$1.40

Output

$4.40

Meta: Muse Spark 1.1

Input

$1.25

1.1× cheaper

Output

$4.25

Meta: Muse Spark 1.1 is cheaper on both — 1.1× input

Writing DNA

Style Comparison

Similarity

66%

Z.ai: GLM 5.1

Meta: Muse Spark 1.1

54%Vocabulary61%

18wSentence Length20w

0.31Hedging0.10

3.6Bold3.7

2.6Lists2.0

0.00Emoji0.01

0.43Headings0.52

0.11Transitions0.02

Based on 27 + 29 text responses

Research

What we learned reading every model

Z.ai: GLM 5.1 and Meta: Muse Spark 1.1 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

Z.ai: GLM 5.1 vs MiniMax M3New provider

Z.ai: GLM 5.1 vs Gemini 3.6 FlashNew provider

Z.ai: GLM 5.1 vs GPT-5New provider

Updated Jul 2026

Our Verdict

Meta: Muse Spark 1.1

Z.ai: GLM 5.1Runner-up

No community votes yet. On paper, Meta: Muse Spark 1.1 has the edge — newer, bigger context window, major provider backing.

Too close to call

API pricing

Cost per 1M tokens

Z.ai: GLM 5.1

Input

$1.40

Output

$4.40

Meta: Muse Spark 1.1

Input

$1.25

1.1× cheaper

Output

$4.25

Meta: Muse Spark 1.1 is cheaper on both — 1.1× input

Writing DNA

Style Comparison

Similarity

66%

Z.ai: GLM 5.1

Meta: Muse Spark 1.1

54%Vocabulary61%

18wSentence Length20w

0.31Hedging0.10

3.6Bold3.7

2.6Lists2.0

0.00Emoji0.01

0.43Headings0.52

0.11Transitions0.02

Based on 27 + 29 text responses

Research

What we learned reading every model

Z.ai: GLM 5.1 and Meta: Muse Spark 1.1 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

Z.ai: GLM 5.1 vs MiniMax M3New provider

Z.ai: GLM 5.1 vs Gemini 3.6 FlashNew provider

Z.ai: GLM 5.1 vs GPT-5New provider