What is the difference between Claude Opus 4.8 and Z.AI: GLM 4.5?

Claude Opus 4.8 is developed by Anthropic while Z.AI: GLM 4.5 is developed by Zhipu AI. Claude Opus 4.8 has a 1.0M token context window vs Z.AI: GLM 4.5's 128K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.8 or Z.AI: GLM 4.5?

It depends on your use case. Claude Opus 4.8 and Z.AI: GLM 4.5 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 Claude Opus 4.8 cost compared to Z.AI: GLM 4.5?

Claude Opus 4.8 costs $5/M input tokens and Z.AI: GLM 4.5 costs $0.6/M input tokens. Z.AI: GLM 4.5 is $4.40/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 Claude Opus 4.8 and Z.AI: GLM 4.5 on Rival?

This page shows a side-by-side comparison of Claude Opus 4.8 and Z.AI: GLM 4.5 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 Claude Opus 4.8 and Z.AI: GLM 4.5?

Claude Opus 4.8 is developed by Anthropic while Z.AI: GLM 4.5 is developed by Zhipu AI. Claude Opus 4.8 has a 1.0M token context window vs Z.AI: GLM 4.5's 128K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.8 or Z.AI: GLM 4.5?

It depends on your use case. Claude Opus 4.8 and Z.AI: GLM 4.5 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 Claude Opus 4.8 cost compared to Z.AI: GLM 4.5?

Claude Opus 4.8 costs $5/M input tokens and Z.AI: GLM 4.5 costs $0.6/M input tokens. Z.AI: GLM 4.5 is $4.40/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 Claude Opus 4.8 and Z.AI: GLM 4.5 on Rival?

This page shows a side-by-side comparison of Claude Opus 4.8 and Z.AI: GLM 4.5 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.

Claude Opus 4.8 vs Z.AI: GLM 4.5: Which Is Better?

Updated May 2026

Our Verdict

Claude Opus 4.8

Z.AI: GLM 4.5Runner-up

No community votes yet. On paper, Claude Opus 4.8 has the edge — bigger model tier, newer, bigger context window.

Z.AI: GLM 4.5 is 11x cheaper per token — worth considering if cost matters.

Slight edge

API pricing

Cost per 1M tokens

Claude Opus 4.8

Input

$5.00

Output

$25.00

Z.AI: GLM 4.5

Input

$0.60

8.3× cheaper

Output

$2.20

11× cheaper

Z.AI: GLM 4.5 is cheaper on both — 8.3× input, 11× output

Writing DNA

Style Comparison

Similarity

31%

Claude Opus 4.8 uses 5.9x more emoji

Claude Opus 4.8

Z.AI: GLM 4.5

60%Vocabulary52%

19wSentence Length14w

0.46Hedging0.49

4.7Bold5.5

3.2Lists4.9

0.78Emoji0.13

1.15Headings0.68

0.04Transitions0.20

Based on 27 + 21 text responses

Research

What we learned reading every model

Claude Opus 4.8 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

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Z.AI: GLM 4.5 vs Grok 3New provider

Z.AI: GLM 4.5 vs OpenAI o3New provider

Updated May 2026

Our Verdict

Claude Opus 4.8

Z.AI: GLM 4.5Runner-up

No community votes yet. On paper, Claude Opus 4.8 has the edge — bigger model tier, newer, bigger context window.

Z.AI: GLM 4.5 is 11x cheaper per token — worth considering if cost matters.

Slight edge

API pricing

Cost per 1M tokens

Claude Opus 4.8

Input

$5.00

Output

$25.00

Z.AI: GLM 4.5

Input

$0.60

8.3× cheaper

Output

$2.20

11× cheaper

Z.AI: GLM 4.5 is cheaper on both — 8.3× input, 11× output

Writing DNA

Style Comparison

Similarity

31%

Claude Opus 4.8 uses 5.9x more emoji

Claude Opus 4.8

Z.AI: GLM 4.5

60%Vocabulary52%

19wSentence Length14w

0.46Hedging0.49

4.7Bold5.5

3.2Lists4.9

0.78Emoji0.13

1.15Headings0.68

0.04Transitions0.20

Based on 27 + 21 text responses

Research

What we learned reading every model

Claude Opus 4.8 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 Grok 3New provider

Z.AI: GLM 4.5 vs OpenAI o3New provider