What is the difference between Z.ai: GLM 5 and GPT-4o (Omni)?

Z.ai: GLM 5 is developed by Zhipu AI while GPT-4o (Omni) is developed by OpenAI. Z.ai: GLM 5 has a 203K token context window vs GPT-4o (Omni)'s 128K. 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 or GPT-4o (Omni)?

It depends on your use case. Z.ai: GLM 5 and GPT-4o (Omni) 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 cost compared to GPT-4o (Omni)?

Z.ai: GLM 5 costs $0.8/M input tokens and GPT-4o (Omni) costs $2.5/M input tokens. Z.ai: GLM 5 is $1.70/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 GPT-4o (Omni) on Rival?

This page shows a side-by-side comparison of Z.ai: GLM 5 and GPT-4o (Omni) 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 GPT-4o (Omni)?

Z.ai: GLM 5 is developed by Zhipu AI while GPT-4o (Omni) is developed by OpenAI. Z.ai: GLM 5 has a 203K token context window vs GPT-4o (Omni)'s 128K. 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 or GPT-4o (Omni)?

It depends on your use case. Z.ai: GLM 5 and GPT-4o (Omni) 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 cost compared to GPT-4o (Omni)?

Z.ai: GLM 5 costs $0.8/M input tokens and GPT-4o (Omni) costs $2.5/M input tokens. Z.ai: GLM 5 is $1.70/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 GPT-4o (Omni) on Rival?

This page shows a side-by-side comparison of Z.ai: GLM 5 and GPT-4o (Omni) 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 GPT-4o (Omni): Which Is Better?

Updated Feb 2026

Our Verdict

Z.ai: GLM 5

GPT-4o (Omni)Runner-up

No community votes yet. On paper, Z.ai: GLM 5 has the edge — newer, bigger context window.

Z.ai: GLM 5 is 3.9x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Z.ai: GLM 5

Input

$0.80

3.1× cheaper

Output

$2.56

3.9× cheaper

GPT-4o (Omni)

Input

$2.50

Output

$10.00

Z.ai: GLM 5 is cheaper on both — 3.1× input, 3.9× output

Writing DNA

Style Comparison

Similarity

71%

GPT-4o (Omni) uses 2.5x more emoji

Z.ai: GLM 5

GPT-4o (Omni)

54%Vocabulary54%

17wSentence Length18w

0.37Hedging0.72

6.3Bold7.3

4.7Lists5.6

0.00Emoji0.03

0.60Headings1.40

0.18Transitions0.26

Based on 22 + 24 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-4o (Omni) vs MiniMax M3New provider

Z.ai: GLM 5 vs GPT-5Cross-provider

Z.ai: GLM 5 vs Llama 4 MaverickNew provider

Updated Feb 2026

Our Verdict

Z.ai: GLM 5

GPT-4o (Omni)Runner-up

No community votes yet. On paper, Z.ai: GLM 5 has the edge — newer, bigger context window.

Z.ai: GLM 5 is 3.9x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Z.ai: GLM 5

Input

$0.80

3.1× cheaper

Output

$2.56

3.9× cheaper

GPT-4o (Omni)

Input

$2.50

Output

$10.00

Z.ai: GLM 5 is cheaper on both — 3.1× input, 3.9× output

Writing DNA

Style Comparison

Similarity

71%

GPT-4o (Omni) uses 2.5x more emoji

Z.ai: GLM 5

GPT-4o (Omni)

54%Vocabulary54%

17wSentence Length18w

0.37Hedging0.72

6.3Bold7.3

4.7Lists5.6

0.00Emoji0.03

0.60Headings1.40

0.18Transitions0.26

Based on 22 + 24 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-4o (Omni) vs MiniMax M3New provider

Z.ai: GLM 5 vs GPT-5Cross-provider

Z.ai: GLM 5 vs Llama 4 MaverickNew provider