What is the difference between GLM 4.5 and Grok Code Fast 1?

GLM 4.5 is developed by Zhipu AI while Grok Code Fast 1 is developed by xAI. GLM 4.5 has a 128K token context window vs Grok Code Fast 1's 256K. You can compare their actual outputs across 55 challenges on Rival to see how they differ in practice.

Which is better, GLM 4.5 or Grok Code Fast 1?

It depends on your use case. GLM 4.5 and Grok Code Fast 1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 55 challenges so you can judge which fits your needs best.

How much does GLM 4.5 cost compared to Grok Code Fast 1?

GLM 4.5 costs $0.6/M input tokens and Grok Code Fast 1 costs $0.2/M input tokens. Grok Code Fast 1 is $0.40/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 GLM 4.5 and Grok Code Fast 1 on Rival?

This page shows a side-by-side comparison of GLM 4.5 and Grok Code Fast 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 GLM 4.5 and Grok Code Fast 1?

GLM 4.5 is developed by Zhipu AI while Grok Code Fast 1 is developed by xAI. GLM 4.5 has a 128K token context window vs Grok Code Fast 1's 256K. You can compare their actual outputs across 55 challenges on Rival to see how they differ in practice.

Which is better, GLM 4.5 or Grok Code Fast 1?

It depends on your use case. GLM 4.5 and Grok Code Fast 1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 55 challenges so you can judge which fits your needs best.

How much does GLM 4.5 cost compared to Grok Code Fast 1?

GLM 4.5 costs $0.6/M input tokens and Grok Code Fast 1 costs $0.2/M input tokens. Grok Code Fast 1 is $0.40/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 GLM 4.5 and Grok Code Fast 1 on Rival?

This page shows a side-by-side comparison of GLM 4.5 and Grok Code Fast 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.

Updated Aug 2025

GLM 4.5vsGrok Code Fast 1

Grok Code Fast 1 is cheaper than GLM 4.5 at $0.2/M vs $0.6/M input tokens.

GLM 4.5 and Grok Code Fast 1 compared across 55 shared prompts
Spec	GLM 4.5	Grok Code Fast 1
Input price	$0.6/M tokens	$0.2/M tokens
Output price	$2.2/M tokens	$1.5/M tokens
Context window	128K tokens	256K tokens
Released	Jul 2025	Aug 2025
SWE-bench Verified	64.2%	70.8%

Our Verdict

GLM 4.5

Grok Code Fast 1

Not enough votes to call it. On the specs, nothing separates them.

Too close to call

What do GLM 4.5 and Grok Code Fast 1 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 4.5

Input

$0.60

Output

$2.20

Grok Code Fast 1

Input

$0.20

3.0× cheaper

Output

$1.50

1.5× cheaper

Grok Code Fast 1 is cheaper on both — 3.0× input, 1.5× output

Writing DNA

Style Comparison

Similarity

53%

GLM 4.5 uses 2.2x more emoji

GLM 4.5

Grok Code Fast 1

52%Vocabulary60%

14wSentence Length17w

0.49Hedging0.97

5.5Bold2.8

4.9Lists2.5

0.13Emoji0.06

0.68Headings0.89

0.20Transitions0.11

Based on 21 + 23 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GLM 4.5 vs MiniMax M3New provider

GLM 4.5 vs Ox AlphaNew provider

GLM 4.5 vs MiniMax M2.7New provider

GLM 4.5 vs Aurora AlphaNew provider

GLM 4.5 vs DeepSeek V4 Flash 0731New provider

GLM 4.5 vs DeepSeek V4 ProNew provider

GLM 4.5 vs DeepSeek V4 Pro 0813New provider

GLM 4.5 vs Devstral 2 2512New provider

Updated Aug 2025

GLM 4.5vsGrok Code Fast 1

Grok Code Fast 1 is cheaper than GLM 4.5 at $0.2/M vs $0.6/M input tokens.

GLM 4.5 and Grok Code Fast 1 compared across 55 shared prompts
Spec	GLM 4.5	Grok Code Fast 1
Input price	$0.6/M tokens	$0.2/M tokens
Output price	$2.2/M tokens	$1.5/M tokens
Context window	128K tokens	256K tokens
Released	Jul 2025	Aug 2025
SWE-bench Verified	64.2%	70.8%

Our Verdict

GLM 4.5

Grok Code Fast 1

Not enough votes to call it. On the specs, nothing separates them.

Too close to call

What do GLM 4.5 and Grok Code Fast 1 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 4.5

Input

$0.60

Output

$2.20

Grok Code Fast 1

Input

$0.20

3.0× cheaper

Output

$1.50

1.5× cheaper

Grok Code Fast 1 is cheaper on both — 3.0× input, 1.5× output

Writing DNA

Style Comparison

Similarity

53%

GLM 4.5 uses 2.2x more emoji

GLM 4.5

Grok Code Fast 1

52%Vocabulary60%

14wSentence Length17w

0.49Hedging0.97

5.5Bold2.8

4.9Lists2.5

0.13Emoji0.06

0.68Headings0.89

0.20Transitions0.11

Based on 21 + 23 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GLM 4.5 vs MiniMax M3New provider

GLM 4.5 vs Ox AlphaNew provider

GLM 4.5 vs MiniMax M2.7New provider

GLM 4.5 vs Aurora AlphaNew provider

GLM 4.5 vs DeepSeek V4 Flash 0731New provider

GLM 4.5 vs DeepSeek V4 ProNew provider

GLM 4.5 vs DeepSeek V4 Pro 0813New provider

GLM 4.5 vs Devstral 2 2512New provider