What is the difference between xAI: Grok 4.5 and MoonshotAI: Kimi K3?

xAI: Grok 4.5 is developed by xAI while MoonshotAI: Kimi K3 is developed by Moonshot AI. xAI: Grok 4.5 has a 500K token context window vs MoonshotAI: Kimi K3's 1.0M. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, xAI: Grok 4.5 or MoonshotAI: Kimi K3?

It depends on your use case. xAI: Grok 4.5 and MoonshotAI: Kimi K3 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 xAI: Grok 4.5 cost compared to MoonshotAI: Kimi K3?

xAI: Grok 4.5 costs $2/M input tokens and MoonshotAI: Kimi K3 costs $3/M input tokens. xAI: Grok 4.5 is $1.00/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 xAI: Grok 4.5 and MoonshotAI: Kimi K3 on Rival?

This page shows a side-by-side comparison of xAI: Grok 4.5 and MoonshotAI: Kimi K3 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 xAI: Grok 4.5 and MoonshotAI: Kimi K3?

xAI: Grok 4.5 is developed by xAI while MoonshotAI: Kimi K3 is developed by Moonshot AI. xAI: Grok 4.5 has a 500K token context window vs MoonshotAI: Kimi K3's 1.0M. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, xAI: Grok 4.5 or MoonshotAI: Kimi K3?

It depends on your use case. xAI: Grok 4.5 and MoonshotAI: Kimi K3 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 xAI: Grok 4.5 cost compared to MoonshotAI: Kimi K3?

xAI: Grok 4.5 costs $2/M input tokens and MoonshotAI: Kimi K3 costs $3/M input tokens. xAI: Grok 4.5 is $1.00/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 xAI: Grok 4.5 and MoonshotAI: Kimi K3 on Rival?

This page shows a side-by-side comparison of xAI: Grok 4.5 and MoonshotAI: Kimi K3 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.

xAI: Grok 4.5 vs MoonshotAI: Kimi K3: Which Is Better?

Updated Jul 2026

Our Verdict

MoonshotAI: Kimi K3

xAI: Grok 4.5Runner-up

No community votes yet. On paper, MoonshotAI: Kimi K3 has the edge — bigger model tier, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

xAI: Grok 4.5

Input

$2.00

1.5× cheaper

Output

$6.00

2.5× cheaper

MoonshotAI: Kimi K3

Input

$3.00

Output

$15.00

xAI: Grok 4.5 is cheaper on both — 1.5× input, 2.5× output

Writing DNA

Style Comparison

Similarity

66%

MoonshotAI: Kimi K3 uses 8.6x more emoji

xAI: Grok 4.5

MoonshotAI: Kimi K3

61%Vocabulary58%

16wSentence Length21w

0.23Hedging0.46

2.5Bold3.6

2.4Lists3.4

0.09Emoji0.78

0.48Headings0.89

0.06Transitions0.17

Based on 27 + 27 text responses

Research

What we learned reading every model

xAI: Grok 4.5 and MoonshotAI: Kimi K3 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

xAI: Grok 4.5 vs MiniMax M3New provider

xAI: Grok 4.5 vs GPT-5New provider

xAI: Grok 4.5 vs Llama 4 MaverickNew provider

Updated Jul 2026

Our Verdict

MoonshotAI: Kimi K3

xAI: Grok 4.5Runner-up

No community votes yet. On paper, MoonshotAI: Kimi K3 has the edge — bigger model tier, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

xAI: Grok 4.5

Input

$2.00

1.5× cheaper

Output

$6.00

2.5× cheaper

MoonshotAI: Kimi K3

Input

$3.00

Output

$15.00

xAI: Grok 4.5 is cheaper on both — 1.5× input, 2.5× output

Writing DNA

Style Comparison

Similarity

66%

MoonshotAI: Kimi K3 uses 8.6x more emoji

xAI: Grok 4.5

MoonshotAI: Kimi K3

61%Vocabulary58%

16wSentence Length21w

0.23Hedging0.46

2.5Bold3.6

2.4Lists3.4

0.09Emoji0.78

0.48Headings0.89

0.06Transitions0.17

Based on 27 + 27 text responses

Research

What we learned reading every model

xAI: Grok 4.5 and MoonshotAI: Kimi K3 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

xAI: Grok 4.5 vs MiniMax M3New provider

xAI: Grok 4.5 vs GPT-5New provider

xAI: Grok 4.5 vs Llama 4 MaverickNew provider