What is the difference between GPT-4.1 and Kimi K2?

GPT-4.1 is developed by OpenAI while Kimi K2 is developed by Moonshot AI. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, GPT-4.1 or Kimi K2?

It depends on your use case. GPT-4.1 and Kimi K2 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 GPT-4.1 cost compared to Kimi K2?

GPT-4.1 costs $2/M input tokens and Kimi K2 costs $0.57/M input tokens. Kimi K2 is $1.43/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 GPT-4.1 and Kimi K2 on Rival?

This page shows a side-by-side comparison of GPT-4.1 and Kimi K2 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 GPT-4.1 and Kimi K2?

GPT-4.1 is developed by OpenAI while Kimi K2 is developed by Moonshot AI. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, GPT-4.1 or Kimi K2?

It depends on your use case. GPT-4.1 and Kimi K2 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 GPT-4.1 cost compared to Kimi K2?

GPT-4.1 costs $2/M input tokens and Kimi K2 costs $0.57/M input tokens. Kimi K2 is $1.43/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 GPT-4.1 and Kimi K2 on Rival?

This page shows a side-by-side comparison of GPT-4.1 and Kimi K2 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.

GPT-4.1 vs Kimi K2: Which Is Better?

Updated Jul 2025

Our Verdict

GPT-4.1

Kimi K2

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Kimi K2 is 3.5x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

GPT-4.1

Input

$2.00

Output

$8.00

Kimi K2

Input

$0.57

3.5× cheaper

Output

$2.30

3.5× cheaper

Kimi K2 is cheaper on both — 3.5× input, 3.5× output

Writing DNA

Style Comparison

Similarity

49%

Kimi K2 uses 2.9x more emoji

GPT-4.1

Kimi K2

58%Vocabulary63%

19wSentence Length19w

0.38Hedging0.35

9.0Bold4.2

6.1Lists3.6

0.24Emoji0.68

1.01Headings0.61

0.07Transitions0.06

Based on 25 + 22 text responses

Research

What we learned reading every model

GPT-4.1 and Kimi K2 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

Kimi K2 vs MiniMax M3New provider

Kimi K2 vs Grok 3New provider

Kimi K2 vs Llama 4 MaverickNew provider

Updated Jul 2025

Our Verdict

GPT-4.1

Kimi K2

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Kimi K2 is 3.5x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

GPT-4.1

Input

$2.00

Output

$8.00

Kimi K2

Input

$0.57

3.5× cheaper

Output

$2.30

3.5× cheaper

Kimi K2 is cheaper on both — 3.5× input, 3.5× output

Writing DNA

Style Comparison

Similarity

49%

Kimi K2 uses 2.9x more emoji

GPT-4.1

Kimi K2

58%Vocabulary63%

19wSentence Length19w

0.38Hedging0.35

9.0Bold4.2

6.1Lists3.6

0.24Emoji0.68

1.01Headings0.61

0.07Transitions0.06

Based on 25 + 22 text responses

Research

What we learned reading every model

GPT-4.1 and Kimi K2 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

Kimi K2 vs MiniMax M3New provider

Kimi K2 vs Grok 3New provider

Kimi K2 vs Llama 4 MaverickNew provider