What is the difference between Claude Opus 5 and Kimi K2?

Claude Opus 5 is developed by Anthropic 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, Claude Opus 5 or Kimi K2?

It depends on your use case. Claude Opus 5 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 Claude Opus 5 cost compared to Kimi K2?

Claude Opus 5 costs $5/M input tokens and Kimi K2 costs $0.57/M input tokens. Kimi K2 is $4.43/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 Claude Opus 5 and Kimi K2 on Rival?

This page shows a side-by-side comparison of Claude Opus 5 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 Claude Opus 5 and Kimi K2?

Claude Opus 5 is developed by Anthropic 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, Claude Opus 5 or Kimi K2?

It depends on your use case. Claude Opus 5 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 Claude Opus 5 cost compared to Kimi K2?

Claude Opus 5 costs $5/M input tokens and Kimi K2 costs $0.57/M input tokens. Kimi K2 is $4.43/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 Claude Opus 5 and Kimi K2 on Rival?

This page shows a side-by-side comparison of Claude Opus 5 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.

Claude Opus 5 vs Kimi K2: Which Is Better?

Updated Jul 2026

Our Verdict

Claude Opus 5

Kimi K2Runner-up

No community votes yet. On paper, Claude Opus 5 has the edge — newer, bigger context window, major provider backing.

Kimi K2 is 11x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 5

Input

$5.00

Output

$25.00

Kimi K2

Input

$0.57

8.8× cheaper

Output

$2.30

11× cheaper

Kimi K2 is cheaper on both — 8.8× input, 11× output

Writing DNA

Style Comparison

Similarity

58%

Kimi K2 uses 40.0x more emoji

Claude Opus 5

Kimi K2

54%Vocabulary63%

21wSentence Length19w

0.40Hedging0.35

3.9Bold4.2

1.9Lists3.6

0.02Emoji0.68

0.71Headings0.61

0.05Transitions0.06

Based on 27 + 22 text responses

Research

What we learned reading every model

Claude Opus 5 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 Gemini 2.5 Pro Preview 06-05New provider

Kimi K2 vs GPT-5New provider

Updated Jul 2026

Our Verdict

Claude Opus 5

Kimi K2Runner-up

No community votes yet. On paper, Claude Opus 5 has the edge — newer, bigger context window, major provider backing.

Kimi K2 is 11x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 5

Input

$5.00

Output

$25.00

Kimi K2

Input

$0.57

8.8× cheaper

Output

$2.30

11× cheaper

Kimi K2 is cheaper on both — 8.8× input, 11× output

Writing DNA

Style Comparison

Similarity

58%

Kimi K2 uses 40.0x more emoji

Claude Opus 5

Kimi K2

54%Vocabulary63%

21wSentence Length19w

0.40Hedging0.35

3.9Bold4.2

1.9Lists3.6

0.02Emoji0.68

0.71Headings0.61

0.05Transitions0.06

Based on 27 + 22 text responses

Research

What we learned reading every model

Claude Opus 5 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 Gemini 2.5 Pro Preview 06-05New provider

Kimi K2 vs GPT-5New provider