What is the difference between Z.ai: GLM 5 and Z.ai: GLM 5.1?

Z.ai: GLM 5 is developed by Zhipu AI while Z.ai: GLM 5.1 is developed by Z-ai. Z.ai: GLM 5 has a 203K token context window vs Z.ai: GLM 5.1's 203K. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, Z.ai: GLM 5 or Z.ai: GLM 5.1?

It depends on your use case. Z.ai: GLM 5 and Z.ai: GLM 5.1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How much does Z.ai: GLM 5 cost compared to Z.ai: GLM 5.1?

Z.ai: GLM 5 costs $0.8/M input tokens and Z.ai: GLM 5.1 costs $1.4/M input tokens. Z.ai: GLM 5 is $0.60/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 and Z.ai: GLM 5.1 on Rival?

This page shows a side-by-side comparison of Z.ai: GLM 5 and Z.ai: GLM 5.1 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 and Z.ai: GLM 5.1?

Z.ai: GLM 5 is developed by Zhipu AI while Z.ai: GLM 5.1 is developed by Z-ai. Z.ai: GLM 5 has a 203K token context window vs Z.ai: GLM 5.1's 203K. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, Z.ai: GLM 5 or Z.ai: GLM 5.1?

It depends on your use case. Z.ai: GLM 5 and Z.ai: GLM 5.1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How much does Z.ai: GLM 5 cost compared to Z.ai: GLM 5.1?

Z.ai: GLM 5 costs $0.8/M input tokens and Z.ai: GLM 5.1 costs $1.4/M input tokens. Z.ai: GLM 5 is $0.60/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 and Z.ai: GLM 5.1 on Rival?

This page shows a side-by-side comparison of Z.ai: GLM 5 and Z.ai: GLM 5.1 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 vs Z.ai: GLM 5.1: Which Is Better?

Updated Apr 2026

Our Verdict

Z.ai: GLM 5

Z.ai: GLM 5.1Runner-up

No community votes yet. On paper, Z.ai: GLM 5 has the edge — bigger model tier, major provider backing.

Too close to call

API pricing

Cost per 1M tokens

Z.ai: GLM 5

Input

$0.80

1.7× cheaper

Output

$2.56

1.7× cheaper

Z.ai: GLM 5.1

Input

$1.40

Output

$4.40

Z.ai: GLM 5 is cheaper on both — 1.7× input, 1.7× output

Writing DNA

Style Comparison

Similarity

68%

Z.ai: GLM 5 uses 1.9x more lists

Z.ai: GLM 5

Z.ai: GLM 5.1

54%Vocabulary54%

17wSentence Length18w

0.37Hedging0.31

6.3Bold3.6

4.7Lists2.6

0.00Emoji0.00

0.60Headings0.43

0.18Transitions0.11

Based on 22 + 27 text responses

Research

What we learned reading every model

Z.ai: GLM 5 and Z.ai: GLM 5.1 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 vs MiniMax M3New provider

Z.ai: GLM 5 vs Claude Opus 4.1New provider

Z.ai: GLM 5 vs GPT OSS 20BNew provider

Updated Apr 2026

Our Verdict

Z.ai: GLM 5

Z.ai: GLM 5.1Runner-up

No community votes yet. On paper, Z.ai: GLM 5 has the edge — bigger model tier, major provider backing.

Too close to call

API pricing

Cost per 1M tokens

Z.ai: GLM 5

Input

$0.80

1.7× cheaper

Output

$2.56

1.7× cheaper

Z.ai: GLM 5.1

Input

$1.40

Output

$4.40

Z.ai: GLM 5 is cheaper on both — 1.7× input, 1.7× output

Writing DNA

Style Comparison

Similarity

68%

Z.ai: GLM 5 uses 1.9x more lists

Z.ai: GLM 5

Z.ai: GLM 5.1

54%Vocabulary54%

17wSentence Length18w

0.37Hedging0.31

6.3Bold3.6

4.7Lists2.6

0.00Emoji0.00

0.60Headings0.43

0.18Transitions0.11

Based on 22 + 27 text responses

Research

What we learned reading every model

Z.ai: GLM 5 and Z.ai: GLM 5.1 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 vs MiniMax M3New provider

Z.ai: GLM 5 vs Claude Opus 4.1New provider

Z.ai: GLM 5 vs GPT OSS 20BNew provider