What is the difference between Claude Opus 4 and Z.AI: GLM 4.5?

Claude Opus 4 is developed by Anthropic while Z.AI: GLM 4.5 is developed by Zhipu AI. Claude Opus 4 has a 200K token context window vs Z.AI: GLM 4.5's 128K. These results are based on blind head-to-head voting across 53 challenges.

Which is better, Claude Opus 4 or Z.AI: GLM 4.5?

Based on 16 community votes on Rival, Claude Opus 4 and Z.AI: GLM 4.5 are closely matched with similar win rates. The better choice depends on your specific use case. Compare their real outputs side-by-side across 53 challenges to decide.

How much does Claude Opus 4 cost compared to Z.AI: GLM 4.5?

Claude Opus 4 costs $15/M input tokens and Z.AI: GLM 4.5 costs $0.6/M input tokens. Z.AI: GLM 4.5 is $14.40/M cheaper per input. The more expensive model wins 50% of duels, so the premium may be justified by quality.

How are Claude Opus 4 vs Z.AI: GLM 4.5 votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 16 votes have been collected for this pair across 53 challenges. All vote data is part of Rival's open dataset.

What is the difference between Claude Opus 4 and Z.AI: GLM 4.5?

Claude Opus 4 is developed by Anthropic while Z.AI: GLM 4.5 is developed by Zhipu AI. Claude Opus 4 has a 200K token context window vs Z.AI: GLM 4.5's 128K. These results are based on blind head-to-head voting across 53 challenges.

Which is better, Claude Opus 4 or Z.AI: GLM 4.5?

Based on 16 community votes on Rival, Claude Opus 4 and Z.AI: GLM 4.5 are closely matched with similar win rates. The better choice depends on your specific use case. Compare their real outputs side-by-side across 53 challenges to decide.

How much does Claude Opus 4 cost compared to Z.AI: GLM 4.5?

Claude Opus 4 costs $15/M input tokens and Z.AI: GLM 4.5 costs $0.6/M input tokens. Z.AI: GLM 4.5 is $14.40/M cheaper per input. The more expensive model wins 50% of duels, so the premium may be justified by quality.

How are Claude Opus 4 vs Z.AI: GLM 4.5 votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 16 votes have been collected for this pair across 53 challenges. All vote data is part of Rival's open dataset.

Claude Opus 4 vs Z.AI: GLM 4.5: Which Is Better?

Updated Jul 2025

Our Verdict

Claude Opus 4

Z.AI: GLM 4.5

Too close to call. Pick based on your use case.

Pick Claude Opus 4 for Image Generation. Pick Z.AI: GLM 4.5 for Web Design. Z.AI: GLM 4.5 is 34x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4

Input

$15.00

Output

$75.00

Z.AI: GLM 4.5

Input

$0.60

25× cheaper

Output

$2.20

34× cheaper

Z.AI: GLM 4.5 is cheaper on both — 25× input, 34× output

Writing DNA

Style Comparison

Similarity

75%

Claude Opus 4 uses 4.3x more sentence length

Claude Opus 4

Z.AI: GLM 4.5

64%Vocabulary52%

62wSentence Length14w

0.52Hedging0.49

4.4Bold5.5

9.1Lists4.9

0.11Emoji0.13

1.87Headings0.68

0.27Transitions0.20

Based on 16 + 21 text responses

Research

What we learned reading every model

Claude Opus 4 and Z.AI: GLM 4.5 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 4.5 vs MiniMax M3New provider

Z.AI: GLM 4.5 vs GPT-5New provider

Z.AI: GLM 4.5 vs Claude Sonnet 4Cross-provider

Updated Jul 2025

Our Verdict

Claude Opus 4

Z.AI: GLM 4.5

Too close to call. Pick based on your use case.

Pick Claude Opus 4 for Image Generation. Pick Z.AI: GLM 4.5 for Web Design. Z.AI: GLM 4.5 is 34x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4

Input

$15.00

Output

$75.00

Z.AI: GLM 4.5

Input

$0.60

25× cheaper

Output

$2.20

34× cheaper

Z.AI: GLM 4.5 is cheaper on both — 25× input, 34× output

Writing DNA

Style Comparison

Similarity

75%

Claude Opus 4 uses 4.3x more sentence length

Claude Opus 4

Z.AI: GLM 4.5

64%Vocabulary52%

62wSentence Length14w

0.52Hedging0.49

4.4Bold5.5

9.1Lists4.9

0.11Emoji0.13

1.87Headings0.68

0.27Transitions0.20

Based on 16 + 21 text responses

Research

What we learned reading every model

Claude Opus 4 and Z.AI: GLM 4.5 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 4.5 vs MiniMax M3New provider

Z.AI: GLM 4.5 vs GPT-5New provider

Z.AI: GLM 4.5 vs Claude Sonnet 4Cross-provider