What is the difference between GLM 5.1 and Grok 4.5?

GLM 5.1 is developed by Z-ai while Grok 4.5 is developed by xAI. GLM 5.1 has a 203K token context window vs Grok 4.5's 500K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GLM 5.1 or Grok 4.5?

It depends on your use case. GLM 5.1 and Grok 4.5 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 GLM 5.1 cost compared to Grok 4.5?

GLM 5.1 costs $1.4/M input tokens and Grok 4.5 costs $2/M input tokens. GLM 5.1 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 GLM 5.1 and Grok 4.5 on Rival?

This page shows a side-by-side comparison of GLM 5.1 and Grok 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 GLM 5.1 and Grok 4.5?

GLM 5.1 is developed by Z-ai while Grok 4.5 is developed by xAI. GLM 5.1 has a 203K token context window vs Grok 4.5's 500K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GLM 5.1 or Grok 4.5?

It depends on your use case. GLM 5.1 and Grok 4.5 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 GLM 5.1 cost compared to Grok 4.5?

GLM 5.1 costs $1.4/M input tokens and Grok 4.5 costs $2/M input tokens. GLM 5.1 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 GLM 5.1 and Grok 4.5 on Rival?

This page shows a side-by-side comparison of GLM 5.1 and Grok 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.

GLM 5.1 vs Grok 4.5: Which Is Better?

Updated Jul 2026

Our Verdict

Grok 4.5

GLM 5.1Runner-up

No community votes yet. On paper, Grok 4.5 has the edge — newer, bigger context window, major provider backing.

Too close to call

What do GLM 5.1 and Grok 4.5 say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

GLM 5.1

Input

$1.40

1.4× cheaper

Output

$4.40

1.4× cheaper

Grok 4.5

Input

$2.00

Output

$6.00

GLM 5.1 is cheaper on both — 1.4× input, 1.4× output

Writing DNA

Style Comparison

Similarity

61%

Grok 4.5 uses 9.0x more emoji

GLM 5.1

Grok 4.5

54%Vocabulary61%

18wSentence Length16w

0.31Hedging0.23

3.6Bold2.5

2.6Lists2.4

0.00Emoji0.09

0.43Headings0.48

0.11Transitions0.06

Based on 27 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Grok 4.5 vs MiniMax M3New provider

GLM 5.1 vs Ox AlphaNew provider

GLM 5.1 vs Claude Sonnet 4New provider

Updated Jul 2026

Our Verdict

Grok 4.5

GLM 5.1Runner-up

No community votes yet. On paper, Grok 4.5 has the edge — newer, bigger context window, major provider backing.

Too close to call

What do GLM 5.1 and Grok 4.5 say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

GLM 5.1

Input

$1.40

1.4× cheaper

Output

$4.40

1.4× cheaper

Grok 4.5

Input

$2.00

Output

$6.00

GLM 5.1 is cheaper on both — 1.4× input, 1.4× output

Writing DNA

Style Comparison

Similarity

61%

Grok 4.5 uses 9.0x more emoji

GLM 5.1

Grok 4.5

54%Vocabulary61%

18wSentence Length16w

0.31Hedging0.23

3.6Bold2.5

2.6Lists2.4

0.00Emoji0.09

0.43Headings0.48

0.11Transitions0.06

Based on 27 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Grok 4.5 vs MiniMax M3New provider

GLM 5.1 vs Ox AlphaNew provider

GLM 5.1 vs Claude Sonnet 4New provider